| City, 
                State County Country | Intersection (Lat, Lng) | Type Status | Control Type / Other Control Type | Approaches / Driveways / ICD (m) | Functional Class / LaneType | Year Completed | Comments | 
|---|---|---|---|---|---|---|---|
| Camas,
                WA Clark Co. United States | SE Brady Rd. / Columbia Palisades Dr. (45.58617, -122.47084) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 42.6717 | Other (At-Grade) Single-Lane | 2018 | |
| San Francisco,
                CA San Francisco Co. United States | Font Blvd. / Chumasero Dr. (37.71501, -122.47298) | Other Existing | Unknown Unknown | 3 Approaches 0 Driveways 25.5093 | Other (At-Grade) Single-Lane | 1950 | ICD estimated from Google Maps linework. | 
| San Francisco,
                CA San Francisco Co. United States | Font Blvd. / Cambon Dr. (37.71590, -122.47445) | Other Existing | Unknown Unknown | 3 Approaches 0 Driveways 28.3433 | Other (At-Grade) Single-Lane | 1950 | ICD estimated from Google Maps linework. | 
| San Francisco,
                CA San Francisco Co. United States | Crespi Dr. / Varela Ave. / Serrano Dr. / Gonzalez Dr. (37.71990, -122.47589) | Other Existing | Unknown Unknown | 5 Approaches 0 Driveways 43.4574 | Other (At-Grade) Single-Lane | 1950 | ICD estimated from Google Maps linework. | 
| San Francisco,
                CA San Francisco Co. United States | Font Blvd. / Gonzalez Dr. (37.71679, -122.47592) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 30.2325 | Other (At-Grade) Single-Lane | 1950 | ICD estimated from Google Maps linework. | 
| San Francisco,
                CA San Francisco Co. United States | Juan Bautista Circle (37.71804, -122.47795) | Other Existing | All-Way Stop Unknown | 7 Approaches 0 Driveways 120.9281 | Other (At-Grade) Single-Lane | 1950 | ICD estimated from Google Maps linework. | 
| San Francisco,
                CA San Francisco Co. United States | Grijalva Dr. / Gonzalez Dr. (37.71638, -122.47919) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 21.7298 | Other (At-Grade) Single-Lane | 1950 | ICD estimated from Google Maps linework. | 
| San Francisco,
                CA San Francisco Co. United States | Font Blvd. / Serrano Dr. (37.71957, -122.47976) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 32.1209 | Other (At-Grade) Single-Lane | 1950 | ICD estimated from Google Maps linework. | 
| San Francisco,
                CA San Francisco Co. United States | Bucareli Dr. / Gonzalez Dr. (37.71695, -122.48001) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 18.8953 | Other (At-Grade) Single-Lane | 1950 | ICD estimated from Google Maps linework. | 
| San Francisco,
                CA San Francisco Co. United States | Font Blvd. / Pinto Ave. / Holloway Ave. (37.72069, -122.48105) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 32.1204 | Other (At-Grade) Single-Lane | 1950 | ICD estimated from Google Maps linework. | 
| San Francisco,
                CA San Francisco Co. United States | Font Blvd. / Arballo Dr. (37.72177, -122.48231) | Other Existing | Unknown Unknown | 4 Approaches 0 Driveways 35.8987 | Other (At-Grade) Single-Lane | 1950 | ICD estimated from Google Maps linework. | 
| San Francisco State University,
                CA San Francisco Co. United States | Font Blvd. / (parking lot) (37.72286, -122.48358) | Other Existing | One-Way/Two-Way Stop Unknown | 3 Approaches 0 Driveways 33.0641 | Other (At-Grade) Single-Lane | 1950 | ICD estimated from Google Maps linework. | 
| Bellingham,
                WA Whatcom Co. United States | N State St. / Wharf St. / N Forest St. / Boulevard (48.74361, -122.48473) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 48.8297 | Other (At-Grade) Single-Lane | 2013 | Open October 2013. ICD estimated from Google Maps linework. | 
| Clackamas,
                OR Clackamas Co. United States | SE 172nd Ave. / SE Creekwood Rd. (45.41880, -122.48550) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 43.5928 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | Creekwood Rd. is new roadway; SE 172nd Avenue is existing. ICD estimated from Google Maps linework. | 
| Lynden,
                WA Whatcom Co. United States | SR 539 / Pole Rd. (48.89152, -122.48560) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 47.1153 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | ICD estimated from Google Maps linework. | 
| Lynden,
                WA Whatcom Co. United States | SR 539 / Wiser Lake Rd. (48.90677, -122.48560) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 47.1009 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | ICD estimated from Google Maps linework. | 
| Lynden,
                WA Whatcom Co. United States | SR 539 / River Rd. (48.92280, -122.48565) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 47.0858 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | ICD estimated from Google Maps linework. | 
| Happy Valley,
                OR Clackamas Co. United States | SE 172nd Ave. / Scouters Mountain Rd. (45.44074, -122.48574) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2021 | East leg stubbed. https://www.happyvalleyor.gov/business/engineering-division/engineering-division/172nd-avenue-roundabout/ | 
| Lynden,
                WA Whatcom Co. United States | SR 539 / Ten Mile Rd. (48.86968, -122.48580) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 46.3503 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | ICD estimated from Google Maps linework. | 
| Bellingham,
                WA Whatcom Co. United States | W Illinois St. / Meridian St. (48.76817, -122.48609) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 18.2880 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2025 | https://cob.org/project/west-illinois-multimodal | 
| La Conner,
                WA Skagit Co. United States | LaConner-Whitney Rd. / Chilberg Rd. / Morris Sr. (48.39234, -122.48660) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 28.5504 | Other (At-Grade) Single-Lane | 2003 | Roundabout replaces a Y intersection. The center island is under private ownership and contains an exisitng granite monument. Opened September 2003. Previously controlled by one-way stop Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Quesnel,
                BC Cariboo Canada | Johnston Ave. / Ranch Rd. (52.97197, -122.48810) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 53.0000 | Other (At-Grade) Single-Lane | 2005 | Year Completed 2005 or earlier. | 
| Vancouver,
                WA Clark Co. United States | SR 500 (NE Fourth Plain Rd.) / NE182nd Ave. (45.67192, -122.48864) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 26.8221 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2022 | Compact roundabout. WSDOT project. Completed August 20, 2022. Colored apron with asphalt interior. | 
| Bellingham,
                WA Whatcom Co. United States | Cordata Pkwy. / Westerly Dr. (48.79198, -122.49140) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.4068 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2005 | http://cob.org/documents/pw/curconst/ES-0237.pdf Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Bellingham,
                WA Whatcom Co. United States | Cordata Pkwy. / Kellogg Rd. (48.79511, -122.49170) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.3384 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2003 | Primary access to Whatcom Community College. Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Tacoma,
                WA Pierce Co. United States | S Tyler St. / S 66th St. (47.19746, -122.49280) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 25.9685 | Other (At-Grade) Single-Lane | 2005 | Opened July 2005. Fatal crash August 12. 2006. 11861-05. ICD estimated from Google Maps linework. | 
| Sausalito,
                CA Marin Co. United States | Conzelman Rd. / McCullough Rd. (37.83361, -122.49400) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 29.2415 | Other (At-Grade) Single-Lane | 2010 | ICD estimated from Google Maps linework. | 
| Bellingham,
                WA Whatcom Co. United States | Cordata Pkwy. / Stuart Rd. (48.79931, -122.49572) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.4016 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2019 | https://www.cob.org/gov/projects/Pages/Cordata%20Stuart%20Roundabout.aspx. ICD estimated from Google Maps linework. | 
| Tacoma,
                WA Thurston Co. United States | N. 37th St. / Stevens St. / Mason Ave. (47.28197, -122.49590) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 21.8760 | Other (At-Grade) Single-Lane | 2007 | One leg skewed at ~60 degrees. Opened April 2007. Previously controlled by two-way stop ICD estimated from Google Maps linework. | 
| Bellingham,
                WA Whatcom Co. United States | Cordata Pkwy. / Horton Rd. (48.80595, -122.49677) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 31.0896 | Other (At-Grade) Single-Lane | 2019 | Curb returns are further back from ICD than leading ends of splitter islands. | 
| Clackamas,
                OR Clackamas Co. United States | SE 157th Ave. / SE 162nd Ave. (45.42429, -122.49770) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.8826 | Other (At-Grade) Single-Lane | 2008 | ICD estimated from Google Maps linework. | 
| (unincorporated),
                CA Sonoma Co. United States | Arnold Dr. / Agua Caliente Rd. (38.32045, -122.50220) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 31.8586 | Other (At-Grade) Single-Lane | 2013 | Completed 2013. Previously controlled by two-way stop ICD estimated from Google Maps linework. | 
| Bellingham,
                WA Whatcom Co. United States | Northwest Blvd. / McLeod Rd. (48.78262, -122.50297) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 56.6614 | Other (At-Grade) Single-Lane | 2013 | Open June 2013. ICD estimated from Google Maps linework. | 
| Ruston,
                WA Pierce Co. United States | Main St. / Bay View Corridor (47.29744, -122.50297) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 25.1095 | Other (At-Grade) Single-Lane | 2014 | Open September 2014. ICD estimated from Google Maps linework. | 
| Bellingham,
                WA Whatcom Co. United States | Northwest Ave. / I-5 NB Ramp (48.78500, -122.50420) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 35.4117 | Freeway Ramps (Grade-Separated) Single-Lane | 2010 | RT bypass lane on southbound approach. ICD estimated from Google Maps linework. | 
| Ruston,
                WA Pierce Co. United States | N Ruston Way / Grand Ave. (47.29725, -122.50488) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 79.3788 | Other (At-Grade) Single-Lane | 2012 | ICD estimated from Google Maps linework. | 
| Ruston,
                WA Pierce Co. United States | N Ruston Way / Baltimore St. / N 51st St. / Yacht Club Rd. (47.29908, -122.50894) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 101.2449 | Other (At-Grade) Single-Lane | 2012 | ICD estimated from Google Maps linework. | 
| Happy Valley,
                OR Clackamas Co. United States | SE 145th Ave. / SE 147th Ave. / Scouters Mountain Rd. (45.44111, -122.51231) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 36.0336 | Other (At-Grade) Single-Lane | 2018 | ICD estimated from Google Maps linework. | 
| (unincorporated),
                OR Clackamas Co. United States | SE 147th Ave. / Oregon Trail Dr. / Hines Dr. / Sieben Pkwy. (45.42280, -122.51240) | Other Existing | All-Way Stop None | 4 Approaches 0 Driveways 34.3688 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Tacoma,
                WA Pierce Co. United States | (unknown) / (unknown) (47.30214, -122.51434) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 27.5370 | Other (At-Grade) Single-Lane | 2018 | Year Completed estimated (2018-2019). ICD estimated from Google Maps linework. | 
| Tacoma,
                WA Pierce Co. United States | N Pearl St. / Five Mile Dr. / N Waterfront Dr. / Ferry Crossing Landing Rd / Park Ave. (47.30193, -122.51556) | Roundabout Existing | All-Way Yield Unknown | 5 Approaches 0 Driveways 32.3966 | Other (At-Grade) Single-Lane | 2018 | https://www.thenewstribune.com/news/local/article196233104.html ICD estimated from Google Maps linework. | 
| Lakewood,
                WA Pierce Co. United States | Main St. SW / 5th Ave. SW (47.16198, -122.51570) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 28.4220 | Other (At-Grade) Single-Lane | 2002 | Completed June 2002. ICD estimated from Google Maps linework. | 
| University Place,
                WA Pierce Co. United States | Cirque Dr. W / Alameda Ave. W / 56th St. W (47.20639, -122.51600) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 54.3624 | Other (At-Grade) Single-Lane | 2002 | Completed December 2002. ICD estimated from Google Maps linework. | 
| Hockinson,
                WA Clark Co. United States | NE 152nd Ave. / NE 119th St. (45.70833, -122.51640) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2024 | https://clark.wa.gov/public-works/ne-119th-st-and-ne-152nd-ave | 
| Swinomish Tribal Community,
                WA Skagit Co. United States | Knudsen Ln. / Casino Dr. (48.45635, -122.51910) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.2668 | Other (At-Grade) Single-Lane | 2013 | Year Completed estimated (2012-2013). ICD estimated from Google Maps linework. | 
| Swinomish Tribal Community,
                WA Skagit Co. United States | SR 20 / Padilla Heights Rd. (48.45519, -122.51940) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 37.2280 | Other (At-Grade) Single-Lane | 2002 | The ground breaking ceremony was held October 2002. The client is the Swinomish Tribe. Opened October 2002. Functional Class: Local ICD estimated from Google Maps linework. | 
| Bainbridge Island,
                WA Kitsap Co. United States | High School Rd. / Madison Ave. (47.63579, -122.52100) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 24.9484 | Other (At-Grade) Single-Lane | 2000 | Greatly reduced congestion. Initial public opposition has turned to full support. Project located next to 3 schools. Separated sidewalks, timed yellow flashing lights during school crossing. Crossing guards. Near library and shopping center. Opened October 2000. ICD estimated from Google Maps linework. | 
| Bainbridge Island,
                WA Kitsap Co. United States | Madison Ave. N / Wyatt Way (47.62849, -122.52100) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 17.6784 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2021 | https://www.bainbridgereview.com/news/wyatt-mini-roundabout-wont-have-art/ | 
| Battle Ground,
                WA Clark Co. United States | SR 503 (NE Lewisville Hwy.) / NE Rock Creek Rd. (45.85681, -122.52193) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2024 | https://www.tiktok.com/@washingtonstatedot/video/7427125569801817374 | 
| Lakewood,
                WA Pierce Co. United States | Dekoven Rd. SW / Meadow Rd. SW / Brook Ln. SW (47.16401, -122.52634) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 15.2400 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2018 | Painted splitter islands. Skewed intersection. | 
| Lakewood,
                WA Pierce Co. United States | Gravelly Lake Dr. SW / Nyanza Rd. SW (47.14110, -122.52665) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2021 | |
| Lakewood,
                WA Pierce Co. United States | Dekoven Dr. SW / 100th St. SW (47.16666, -122.52814) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 15.2400 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2018 | Painted splitter islands. | 
| Vancouver,
                WA Clark Co. United States | NE 32nd Cir. / NE 138th Ave. (45.64517, -122.53057) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 40.0778 | Other (At-Grade) Single-Lane | 2013 | ICD estimated from Google Maps linework. | 
| Bellingham,
                WA Whatcom Co. United States | Mitchell Way / Bellingham Airport Access Rd. (48.79757, -122.53080) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 31.4692 | Other (At-Grade) Single-Lane | 2003 | ICD estimated from Google Maps linework. | 
| Vancouver,
                WA Clark Co. United States | NE 137th Ave. / NE 49th St. (45.65733, -122.53190) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 40.0691 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2008 | Opened January 2008. ICD estimated from Google Maps linework. | 
| Vancouver,
                WA Clark Co. United States | NE 44th St. / NE 137th Ave. (45.65377, -122.53207) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 25.8796 | Other (At-Grade) Single-Lane | 2013 | ICD estimated from Google Maps linework. | 
| Vancouver,
                WA Clark Co. United States | NE 39th St. / NE 137th Ave. / NE 138th Ave. (45.65025, -122.53209) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 38.4044 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2013 | ICD estimated from Google Maps linework. | 
| San Rafael,
                CA Marin Co. United States | Civic Center Dr. / Peter Behr Dr. (38.00051, -122.53422) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 34.8221 | Other (At-Grade) Single-Lane | 2016 | ICD estimated from Google Maps linework. | 
| University Place,
                WA Pierce Co. United States | 40th St. W / Drexler Dr. W (47.22084, -122.53430) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 31.6351 | Other (At-Grade) Single-Lane | 2006 | Completed June 2006. ICD estimated from Google Maps linework. | 
| Lakewood,
                WA Pierce Co. United States | Gravelly Lake Dr. SW / Veterans Dr. SW (47.14497, -122.53853) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2022 | https://thesubtimes.com/2021/12/26/progress-at-veterans-and-gravelly-lake-intersection-in-lakewood/ | 
| Lakewood,
                WA Pierce Co. United States | Gravelly Lake Dr. SW / Washington Blvd. SW (47.14920, -122.53942) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2022 | https://cityoflakewood.us/weekly-bulletin-220408/ | 
| Maple Ridge,
                BC Greater Vancouver Canada | Jackson Rd. / 102 Ave. (49.18779, -122.54119) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 26.5401 | Other (At-Grade) Single-Lane | 2012 | Year Completed estimated (2012-2013). ICD estimated from Google Maps linework. | 
| Lakewood,
                WA Pierce Co. United States | Washington Blvd. SW / Interlaaken Dr. SW (47.14862, -122.54186) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 32.0040 | Other (At-Grade) Single-Lane | 2022 | Year Completed estimated (2021-2022). | 
| Joint Base Lewis-McChord,
                WA Pierce Co. United States | Murray Rd. SW / 150th St. SW (47.12084, -122.54259) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 48.7680 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2012 | Open September 2012. | 
| Lakewood,
                WA Pierce Co. United States | Murray Rd. SW / I-5 NB Offramp (47.12576, -122.54266) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 0.0000 | Freeway Ramps (Grade-Separated) Single-Lane | 2020 | https://wsdotblog.blogspot.com/2020/10/new-thorne-lane-bridge-open.html | 
| Lakewood,
                WA Pierce Co. United States | Union Ave. SW / N Thorne Ln. SW (47.12715, -122.54422) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 21.3360 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2020 | https://wsdotblog.blogspot.com/2020/10/new-thorne-lane-bridge-open.html. | 
| Ferndale,
                WA Whatcom Co. United States | Slater Rd. / Pacific Hwy. (48.81718, -122.54435) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 18.8741 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2014 | Open November 2014. ICD estimated from Google Maps linework. | 
| Ferndale,
                WA Whatcom Co. United States | Slater Rd. / I-5 NB Ramps (48.81737, -122.54604) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 27.5247 | Freeway Ramps (Grade-Separated) Single-lane w/ Traversable Central Island | 2014 | Includes yield-controlled right-turn bypass lanes. Open November 2014. ICD estimated from Google Maps linework. | 
| Ferndale,
                WA Whatcom Co. United States | Slater Rd. / I-5 SB Ramps (48.81713, -122.54999) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 38.1000 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, 2x1 max) | 2014 | Initially installed in November 2014 as a single-lane with a traversable central island. Includes a yield-controlled right-turn bypass lane. Modified in 2024-2025 to 2x1 with yield-controlled right-turn-only lane on north and west legs. | 
| Lakewood,
                WA Pierce Co. United States | Veterans Dr. SW / Lake City Blvd. SW (47.14497, -122.55139) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 24.3840 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2020 | |
| Portland,
                OR Multnomah Co. United States | NE 108th St. / NE Oregon St. (45.52814, -122.55147) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2021 | https://bikeportland.org/2022/01/13/video-a-closer-look-at-pbots-three-new-roundabouts-on-ne-108th-343711. | 
| Portland,
                OR Multnomah Co. United States | NE Everett St. / NE 108th Ave. (east) (45.52447, -122.55223) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2021 | Part of a double mini-roundabout. https://bikeportland.org/2022/01/13/video-a-closer-look-at-pbots-three-new-roundabouts-on-ne-108th-343711. | 
| Portland,
                OR Multnomah Co. United States | NE Everett St. / NE 108th St. (west) (45.52447, -122.55243) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2021 | Part of a double mini-roundabout. https://bikeportland.org/2022/01/13/video-a-closer-look-at-pbots-three-new-roundabouts-on-ne-108th-343711. | 
| Clackamas,
                OR Clackamas Co. United States | Monterey Ave. / Causey Ave. / William Otty Rd. (45.44020, -122.55510) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 37.7102 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Portland,
                OR Multnomah Co. United States | NE Cascades Pkwy. / (parking) (45.57191, -122.55594) | Other Existing | Other Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Multilane (2 Lane, unspecified) | ||
| Bainbridge Island,
                WA Kitsap Co. United States | SR 305 / NE Seabold Rd. / NE Port Madison Rd. (47.70104, -122.55759) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2024 | https://wsdot.wa.gov/about/news/2023/safety-improvement-project-sr-305-bainbridge-island-begins-oct-23 | 
| University Place,
                WA Pierce Co. United States | Grandview Dr. / Olympic Blvd. (47.22188, -122.55790) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 25.1454 | Other (At-Grade) Single-Lane | 1997 | Curtis High School and Curtis Junior High School on NE corner of roundabout. Opened August 1997. Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Lakewood,
                WA Pierce Co. United States | Union Ave. / Militia Dr. / Berkeley St. SW (47.11921, -122.55805) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 38.1000 | Other (At-Grade) Single-Lane | 2020 | https://twitter.com/wsdot_tacoma/status/1295357469917474818 | 
| Portland,
                OR Multnomah Co. United States | NE Mt. Hood Ave. / Frontage Rd. / PDX Airport Economy Blue Lot / PDX Airport Economy Red Lot (45.57770, -122.55950) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.7822 | Other (At-Grade) Single-Lane | 2000 | ICD estimated from Google Maps linework. | 
| Lakewood,
                WA Pierce Co. United States | Veterans Dr. SW / Vernon Ave. SW / Newgrove Ave. SW (47.14431, -122.55960) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 30.4800 | Other (At-Grade) Single-Lane | 2020 | Painted splitter island on southeast leg. | 
| Lakewood,
                WA Pierce Co. United States | Veterans Dr. SW / Vernon Ave. SW / Dolly Madison St. SW (47.14243, -122.55988) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 27.4320 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2021 | |
| Bainbridge Island,
                WA Kitsap Co. United States | SR 395 / NE Adas Will Ln. (47.70562, -122.56059) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2024 | https://wsdot.wa.gov/about/news/2023/safety-improvement-project-sr-305-bainbridge-island-begins-oct-23 | 
| Vancouver,
                WA Clark Co. United States | NE 18th St. / I-205 SB On Ramp (45.63554, -122.56193) | Roundabout Existing | All-Way Yield None | 2 Approaches 0 Driveways 33.4039 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) | 2016 | ICD estimated from Google Maps linework. | 
| Joint Base Lewis-McChord,
                WA Pierce Co. United States | Portland Ave. SW / Boundary St. SW / Camp Murray Gate (47.12106, -122.56300) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 27.6312 | Other (At-Grade) Single-Lane | 2012 | Open October 2012. ICD estimated from Google Maps linework. | 
| (unincorporated),
                WA Clark Co. United States | NE 99th St. / 107th Ave. (45.69338, -122.56319) | Roundabout Existing | All-Way Yield None | 3 Approaches 1 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2023 | Previous control was Yield for northbound traffic, Stop for eastbound traffic, none for westbound traffic. https://www.clarkcountytoday.com/news/intersection-of-ne-99th-street-and-ne-107th-avenue-closed-beginning-aug-14/ | 
| Lakewood,
                WA Pierce Co. United States | Washington Blvd. SW / Edgewood Ave. SW (47.14855, -122.56383) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 27.4320 | Other (At-Grade) Single-Lane | 2023 | |
| Lakewood,
                WA Pierce Co. United States | North Gate Rd. SW / Edgewood Ave. SW / Winona St. SW (47.14678, -122.56385) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2022 | https://www.kiro7.com/news/south-sound-news/stolen-car-stopped-by-wet-cement-lakewood/GDU77T3M6NC2RKBPTKKY5N53SA/ | 
| Clackamas,
                OR Clackamas Co. United States | Monterey Ave. / Stevens Rd. (45.43780, -122.56390) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.8738 | Other (At-Grade) Single-Lane | 2006 | Fourth leg serves New Hope Community Church parking lot. ICD estimated from Google Maps linework. | 
| University Place,
                WA Pierce Co. United States | 64th St W / Park Entrance (47.19891, -122.56530) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 28.4022 | Other (At-Grade) Single-Lane | 2004 | Completed before July 2004. ICD estimated from Google Maps linework. | 
| Hidden Valley Lake,
                CA Lake Co. United States | SR 29 / Hartmann Rd. (38.79274, -122.56556) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 44.6823 | Other (At-Grade) Single-Lane | 2019 | ICD estimated from Google Maps linework. | 
| San Anselmo,
                CA Marin Co. United States | San Francisco Blvd. / Santa Cruz Ave. (37.98566, -122.56572) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 12.1920 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2019 | Painted splitter islands. Year Completed estimated (2018-2019). | 
| University Place,
                WA Pierce Co. United States | Grandview Dr. / Bristonwood Dr. / 48th St. W (47.21334, -122.56880) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 25.9607 | Other (At-Grade) Single-Lane | 2000 | Opened September 2000. ICD estimated from Google Maps linework. | 
| University Place,
                WA Pierce Co. United States | Grandview Dr. / Cirque Dr. (47.21093, -122.56880) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 25.1506 | Other (At-Grade) Single-Lane | 2000 | Opened September 2000. ICD estimated from Google Maps linework. | 
| University Place,
                WA Pierce Co. United States | Grandview Dr. / 56th St. W (47.20565, -122.56890) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 24.3417 | Other (At-Grade) Single-Lane | 2000 | Opened September 2000. ICD estimated from Google Maps linework. | 
| University Place,
                WA Pierce Co. United States | Grandview Dr. / 62nd Ct. W / Park Entrance (47.20033, -122.56890) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 26.7785 | Other (At-Grade) Single-Lane | 2000 | Opened September 2000. ICD estimated from Google Maps linework. | 
| Portland,
                OR Multnomah Co. United States | NE Fremont Dr. / NE 86th Ave. (45.54567, -122.57478) | Traffic Calming Circle Existing | Unknown None | 3 Approaches 0 Driveways 25.0931 | Other (At-Grade) Single-Lane | 1986 | Completed 12/2/1986. ICD estimated from Google Maps linework. | 
| Portland,
                OR Multnomah Co. United States | NE Fremont Dr. / NE Dyer St. (45.54603, -122.57509) | Traffic Calming Circle Existing | Unknown None | 3 Approaches 0 Driveways 29.2751 | Other (At-Grade) Single-Lane | 1986 | Completed 12/2/1986. ICD estimated from Google Maps linework. | 
| Portland,
                OR Multnomah Co. United States | NE Fremont Dr. / NE Duddleson St. (45.54667, -122.57574) | Traffic Calming Circle Existing | Unknown None | 4 Approaches 0 Driveways 33.4569 | Other (At-Grade) Single-Lane | 1986 | Completed 12/2/1986. ICD estimated from Google Maps linework. | 
| Five Corners,
                WA Clark Co. United States | NE 94th Ave. / NE 99th St. (45.69343, -122.57575) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2023 | |
| Gig Harbor,
                WA Pierce Co. United States | Point Fosdick Dr. NW / NW 36th St. (47.29077, -122.57790) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 28.3530 | Other (At-Grade) Single-Lane | 2005 | Opened September 2005. ICD estimated from Google Maps linework. |