| City, 
                State County Country | Intersection (Lat, Lng) | Type Status | Control Type / Other Control Type | Approaches / Driveways / ICD (m) | Functional Class / LaneType | Year Completed | Comments | 
|---|---|---|---|---|---|---|---|
| Blaine,
                WA Whatcom Co. United States | I-5 NB Ramps / D St. / 2nd St. (48.99810, -122.75140) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.6939 | Freeway Ramps (Grade-Separated) Single-Lane | 2010 | May 2010. ICD estimated from Google Maps linework. | 
| Gorst,
                WA Kitsap Co. United States | SR 3 / Airport Way SW (47.50426, -122.75160) | Roundabout Existing | All-Way Yield None | 3 Approaches 1 Driveways 41.1480 | Other (At-Grade) Single-Lane | 2021 | Elliptical shaped. ICD = 135 ft x 125 ft. Year Completed estimated (2020-2021). | 
| Lacey,
                WA Thurston Co. United States | Willamette Dr. NE / 31st Ave. NE (47.07789, -122.75228) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 43.9205 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2015 | Open October 2015. ICD estimated from Google Maps linework. | 
| Blaine,
                WA Whatcom Co. United States | I-5 SB Ramps / Peace Portal Dr. / Marine Dr. (48.99723, -122.75250) | Roundabout Existing | All-Way Yield At-grade Rail Crossing Signals/Gates (controlling approach only) | 4 Approaches 0 Driveways 26.6422 | Freeway Ramps (Grade-Separated) Single-Lane | 2010 | May 2010. Roundabout is ~200 ft from railroad crossing. ICD estimated from Google Maps linework. | 
| Olympia,
                WA Thurston Co. United States | Marvin Rd.  SE / Lake Forest Dr. SE / Oakwood St. SE (47.01411, -122.75428) | Roundabout Existing | All-Way Yield Rectangular Rapid Flashing Beacon (RRFB) | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2019 | |
| Woodland,
                WA Cowlitz Co. United States | Dike Access Rd. / I-5 NB Ramps (45.92780, -122.75522) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 42.6720 | Freeway Ramps (Grade-Separated) Single-Lane | 2010 | Raindrop shaped. December 2010. | 
| Seabeck,
                WA Kitsap Co. United States | Seabeck Hwy NW / NW Holly Rd. (47.60901, -122.75692) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways | Other (At-Grade) Single-Lane | 2015 | Open October 2015. | 
| Wilsonville,
                OR Clackamas Co. United States | SW Boeckman Rd. / SW Canyon Creek Rd. (45.31755, -122.75778) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2025 | https://www.wilsonvilleoregon.gov/engineering/page/boeckman-road-corridor-improvements | 
| Woodland,
                WA Cowlitz Co. United States | Dike Access Rd. / I-5 SB Ramps (45.92699, -122.75780) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 42.6720 | Freeway Ramps (Grade-Separated) Single-Lane | 2010 | December 2010. | 
| Surrey,
                BC Greater Vancouver Regional District Canada | 8 Ave. / Hwy 99 NB Ramps (49.01694, -122.75800) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 34.4645 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) | 2005 | ICD estimated from Google Maps linework. | 
| Woodland,
                WA Cowlitz Co. United States | Dike Access Rd. / Schurman Way / (parking) (45.92664, -122.75957) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2012 | |
| Lacey,
                WA Thurston Co. United States | (unknown) / (unknown) (47.04571, -122.76216) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 30.4800 | Other (At-Grade) Single-Lane | 2007 | Serves Lacey Regional Athletic Center. July 2007. | 
| Surrey,
                BC Greater Vancouver Regional District Canada | King George Hwy / 8th Ave. (49.01661, -122.76240) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 34.4647 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Surrey,
                BC Greater Vancouver Canada | 25 Ave. / 166 St. (49.04745, -122.76265) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 40.0000 | Other (At-Grade) Single-Lane | 2022 | |
| Lacey,
                WA Thurston Co. United States | SR 510 (Marvin Rd.) / Pacific Ave. (47.03941, -122.76480) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 32.5572 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2003 | Completed July 28, 2003. Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Lacey,
                WA Thurston Co. United States | Hogum Bay Rd. NE / Willamette Dr. NE (47.06943, -122.76485) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 39.8601 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2017 | ICD estimated from Google Maps linework. | 
| Prince George,
                BC Fraser-Fort George Region Canada | Cameron St. / N. Neechako Rd. (53.92850, -122.76743) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 42.0000 | Other (At-Grade) Single-Lane | 2009 | Completed August 2009. http://www.city.pg.bc.ca/city_services/transportation/cameronstreetbridge/ | 
| Lacey,
                WA Thurston Co. United States | Marvin Rd. NE / Main St. NE (47.06709, -122.76828) | Roundabout Existing | All-Way Yield None | 2 Approaches 0 Driveways 48.7680 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2000 | Roundabout installed, although cross street not initially constructed. | 
| Lacey,
                WA Thurston Co. United States | I-5 NB Off-Ramp / Galaxy Dr. / Quinault Dr. (47.06127, -122.76890) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 32.5438 | Other (At-Grade) Single-Lane | 2000 | Completed November 1, 2000. ICD estimated from Google Maps linework. | 
| Lacey,
                WA Thurston Co. United States | Vashon Dr. NE / Columbia Way NE (47.09724, -122.77000) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 26.0175 | Other (At-Grade) Single-Lane | 2005 | Opened December 2005. ICD estimated from Google Maps linework. | 
| Port Townsend,
                WA Jefferson Co. United States | SR 20 / Kearney St. (48.11000, -122.77066) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Unknown | 2023 | |
| Lacey,
                WA Thurston Co. United States | Marvin Rd. / Britton Pkwy. (47.06905, -122.77090) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 46.3682 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2000 | Completed September 14, 2000. Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Surrey,
                BC Greater Vancouver Regional District Canada | King George Hwy / 14th St. (Ave.?) (49.02746, -122.77110) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 29.7585 | Other (At-Grade) Single-Lane | 2007 | http://www.icbc.com/road_safety/road_improve_pu/surrey.asp ICD estimated from Google Maps linework. | 
| Beaverton,
                OR Washington Co. United States | SW 92nd Ave. / SW Allen Blvd. (45.47149, -122.77200) | Roundabout Existing | All-Way Yield Rectangular Rapid Flashing Beacon (RRFB) | 3 Approaches 0 Driveways 32.0040 | Other (At-Grade) Single-Lane | 2022 | RRFB at shared-use crossing on south leg serving Fanno Creek Trail. https://www.beavertonoregon.gov/718/CIP-3112---Allen-Blvd92nd-Ave-Shared-Use?contentId=2643d655-60c2-481d-bf75-2f33d242b523 | 
| Tualatin,
                OR Washington Co. United States | (unknown) (45.35135, -122.77261) | Other Existing | Unknown Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Unknown | ||
| Surrey,
                BC Greater Vancouver Canada | 160 St. / 82 Ave. (49.15184, -122.77886) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 17.1855 | Other (At-Grade) Single-Lane | 2014 | ICD estimated from Google Maps linework. | 
| Lacey,
                WA Thurston Co. United States | Mullen Rd. SE / Carpenter Rd. SE (47.00464, -122.77990) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2021 | Year Completed estimated (2021-2022). | 
| Wilsonville,
                OR Clackamas Co. United States | SW Boeckman Rd. / SW Kinsman Rd. (45.31738, -122.77993) | Roundabout Existing | All-Way Yield None | 3 Approaches 1 Driveways 41.1515 | Other (At-Grade) Single-Lane | 2017 | ICD estimated from Google Maps linework. | 
| Lacey,
                WA Thurston Co. United States | Marvin Rd. / Hawks Prairie Rd. (47.08312, -122.78070) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 27.6509 | Other (At-Grade) Single-Lane | 2002 | Constructed September 14, 2002. Previously controlled by one-way stop Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Olympia,
                WA Thurston Co. United States | Marvin Rd. NE / 41st Ave. NE (47.09046, -122.78075) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 32.0040 | Other (At-Grade) Single-Lane | 2014 | |
| Surrey,
                BC Greater Vancouver Canada | 108 Ave. / 158 St. / 157A St. (49.19886, -122.78424) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 30.0000 | Other (At-Grade) Single-Lane | 2006 | Year Completed estimated (2006-2007). | 
| Lacey,
                WA Thurston Co. United States | Britton Pkwy. NE / Gateway Blvd. (47.06858, -122.78590) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 42.3012 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2007 | Opened September 2007. ICD estimated from Google Maps linework. | 
| Wilsonville,
                OR Clackamas Co. United States | SW Barber St. / Brown Rd. (45.30865, -122.78620) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 40.3179 | Other (At-Grade) Single-Lane | 2007 | ICD estimated from Google Maps linework. | 
| Wilsonville,
                OR Clackamas Co. United States | SW Carinthia Circle (45.31150, -122.78783) | Other Existing | Unknown Unknown | 5 Approaches 0 Driveways 0.0000 | Other (At-Grade) Unknown | ||
| Wilsonville,
                OR Clackamas Co. United States | SW Boeckman Rd. / Tooze Rd. (45.31616, -122.78790) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 40.3126 | Other (At-Grade) Single-Lane | 2008 | ICD estimated from Google Maps linework. | 
| Surrey,
                BC Greater Vancouver Canada | 108 Ave. / 156 St. (49.19885, -122.78978) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 30.0000 | Other (At-Grade) Single-Lane | 2016 | Year Completed estimated (2015-2016). | 
| Surrey,
                BC Greater Vancouver Canada | 156 St. / 82 Ave. (49.15186, -122.79010) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 21.0913 | Other (At-Grade) Single-Lane | 2016 | ICD estimated from Google Maps linework. | 
| Wilsonville,
                OR Clackamas Co. United States | SW Barber St. / Costa Cir. / 110th Ave. (45.30843, -122.79090) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 41.1580 | Other (At-Grade) Single-Lane | 2007 | ICD estimated from Google Maps linework. | 
| Wilsonville,
                OR Clackamas Co. United States | SW Villebois Dr. / SW Costa Cir. (45.31264, -122.79111) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 44.5145 | Other (At-Grade) Single-Lane | 2014 | Year Completed estimated (2014-2015). ICD estimated from Google Maps linework. | 
| Port Townsend,
                WA Jefferson Co. United States | SR 20 (Sims Way) / Thomas St. (48.10333, -122.79891) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 41.1480 | Other (At-Grade) Single-Lane | 2010 | July 2010. | 
| Lacey,
                WA Thurston Co. United States | Britton Pkwy. NE / Carpenter Rd. NE / Britton Ln. NE (47.06434, -122.79957) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2024 | No splitter island on north leg. https://cityoflacey.org/projects/carpenter-road-britton-parkway-roundabout/ | 
| Wilsonville,
                OR Clackamas Co. United States | SW Grahams Ferry Rd. / SW Barber St. (45.31273, -122.80170) | Roundabout Existing | All-Way Yield None | 3 Approaches 1 Driveways 26.0368 | Other (At-Grade) Single-Lane | 2014 | ICD estimated from Google Maps linework. | 
| Wilsonville,
                OR Clackamas Co. United States | SW Alta Ln. / SW Alta Ct. (45.30418, -122.80186) | Other Existing | Unknown Unknown | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Belfair,
                WA Mason Co. United States | SR 3 / Log Yard Rd. (47.46778, -122.80455) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 45.7200 | Other (At-Grade) Single-Lane | 2020 | Central island truck apron and external truck aprons for long trucks making turns. Year Completed estimated (2018-2021). | 
| Port Townsend,
                WA Jefferson Co. United States | SR 20 (Sims Way) / Howard St. / Evans Vista (48.10260, -122.80500) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 41.1480 | Other (At-Grade) Single-Lane | 2010 | April 2010. | 
| Pemberton,
                BC Pemberton Valley Canada | Portage Rd. / Aspen Blvd. (50.32201, -122.80508) | Roundabout Existing | All-Way Yield At-grade Rail Crossing Signal/Beacon | 3 Approaches 0 Driveways 35.0000 | Other (At-Grade) Single-Lane | ||
| Port Townsend,
                WA Jefferson Co. United States | Discovery Rd. / Rainier St. / Howard St. (48.10787, -122.80624) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 37.4820 | Other (At-Grade) Single-Lane | 2017 | Two-way separated bike path along east side. ICD estimated from Google Maps linework. | 
| Lacey,
                WA Thurston Co. United States | Pacific Ave. / Lacey Blvd. / Lacey St. / Homann Dr. (47.03677, -122.80630) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 53.7220 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2003 | Completed September 16, 2003. Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Beaverton,
                OR Washington Co. United States | SW Hart Rd. / Sorrento Rd. / Juniper Terr. (45.46680, -122.80880) | Other Existing | All-Way Yield None | 4 Approaches 0 Driveways 25.1283 | Other (At-Grade) Single-Lane | Functional Class: Collector. Pedestrian ramps into circulatory roadway. ICD estimated from Google Maps linework. | |
| Prince George,
                BC Fraser-Fort George Canada | Foothills Blvd. / 18 Ave. (53.90734, -122.81107) | Roundabout Existing | All-Way Yield None | 3 Approaches 1 Driveways | Other (At-Grade) Single-Lane | 2023 | https://www.princegeorge.ca/city-hall/news-notices/roundabout-construction-complete | 
| Windsor,
                CA Sonoma Co. United States | Old Redwood Hwy / Market St (38.54956, -122.81353) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 34.5598 | Other (At-Grade) Single-Lane | 2015 | ICD estimated from Google Maps linework. | 
| King City,
                OR Washington Co. United States | SW Fischer Rd. / SW 136th Ave. (45.39676, -122.81642) | Other Existing | All-Way Stop Unknown | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | No splitter islands. | |
| Windsor,
                CA Sonoma Co. United States | Old Redwood Hwy / Windsor Rd (38.55271, -122.81661) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 31.7562 | Other (At-Grade) Single-Lane | 2016 | ICD estimated from Google Maps linework. | 
| Windsor,
                CA Sonoma Co. United States | Windsor River Rd. / Windsor Rd. (38.54725, -122.81687) | Roundabout Existing | All-Way Yield At-grade Rail Crossing Signals/Gates (controlling all approaches) | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2022 | Rail line through central island. | 
| Lacey,
                WA Thurston Co. United States | Parkside Dr. SE / 53rd St. SE (47.00040, -122.81703) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2008 | Year Completed estimated (2006-2009). | 
| Surrey,
                BC Greater Vancouver Canada | 20 Ave. / Rotary Way / (parking lot) (49.03845, -122.81781) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 28.9690 | Other (At-Grade) Single-Lane | 2006 | ICD estimated from Google Maps linework. | 
| White City,
                OR Jackson Co. United States | OR 140 / Atlantic Ave. / Foothill Rd. (42.42259, -122.81859) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2020 | https://content.govdelivery.com/accounts/ORDOT/bulletins/2a5a500 | 
| Lacey,
                WA Thurston Co. United States | Rainier Rd. SE / SE Balustrade Blvd. (46.98697, -122.82220) | Roundabout Existing | All-Way Yield Active Pedestrian Warning (flashing yellow) | 4 Approaches 0 Driveways 45.7200 | Other (At-Grade) Single-Lane | 2005 | September 2005. Horizon Pointe subdivision. Serves as primary access to Horizon Pointe Elementary School. | 
| Lacey,
                WA Thurston Co. United States | College St. / 45th Ave. (47.00710, -122.82310) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.0923 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2002 | Completed November 6, 2002. Previously controlled by two-way stop Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Lacey,
                WA Thurston Co. United States | 22nd Ave. SE / College St. SE (47.02744, -122.82321) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2020 | https://www.theolympian.com/news/local/article245417580.html | 
| Sherwood,
                OR Washington Co. United States | SW Oregon St. / SW Murdock Rd. (45.36060, -122.82520) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 49.5120 | Other (At-Grade) Single-Lane | 2002 | Completed November 2002. ICD estimated from Google Maps linework. | 
| Lacey,
                WA Thurston Co. United States | Pacific Ave. / Golf Club Rd. / Lacey Blvd. (47.03786, -122.82860) | Roundabout Existing | All-Way Yield None | 6 Approaches 0 Driveways 61.8604 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2003 | Completed July 22, 2003. Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Surrey,
                BC Greater Vancouver Canada | 140 St. / 32 Ave. (49.06026, -122.83447) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 30.0000 | Other (At-Grade) Single-Lane | 2022 | https://www.northdeltareporter.com/news/surrey-council-to-consider-contract-for-intersection-work-in-newton-south-surrey-2749829 | 
| Sherwood,
                OR Washington Co. United States | Langer Farms Pkwy. / Century Dr. (45.36454, -122.83630) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 50.3477 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2011 | Opened November 2011 ICD estimated from Google Maps linework. | 
| Beaverton,
                OR Washington Co. United States | SW Teal Blvd. / SW 155th Ave. / SW Nutcracker Ct. (45.44060, -122.83760) | Other Existing | All-Way Stop None | 4 Approaches 0 Driveways 37.7099 | Other (At-Grade) Single-Lane | Characteristics of a roundabout, but yield signs replaced with stop signs in 1998. ICD estimated from Google Maps linework. | |
| Sherwood,
                OR Washington Co. United States | SW Oregon St. / SW 1st St. / SW Ash St. (45.35781, -122.83924) | Other Existing | Uncontrolled Unknown | 4 Approaches 1 Driveways 0.0000 | Other (At-Grade) Single-Lane | ||
| Olympia,
                WA Thurston Co. United States | Chehalis Western Trl. / Woodland Trl. (47.03914, -122.83937) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 15.2400 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2015 | Bicycle trail to bicycle trail only roundabout. | 
| Port Moody,
                BC Greater Vancouver Canada | David Ave. / Hertage Mountain Blvd. / (school access) (49.29850, -122.84327) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 29.5960 | Other (At-Grade) Single-Lane | 2003 | http://www.minnowlake.ca/Roundabouts_in_Canada_2013%20(1).pdf ICD estimated from Google Maps linework. | 
| Tigard,
                OR Washington Co. United States | SW Barrows Rd. / SW Roshak Rd. / (parking lot) (45.42692, -122.84486) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 28.4989 | Other (At-Grade) Single-Lane | 2008 | ICD estimated from Google Maps linework. | 
| Medford,
                OR Jackson Co. United States | Springbrook Rd. / Cedar Links Dr. (42.35287, -122.84582) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2021 | https://www.medfordoregon.gov/News-Articles/Springbrook-Road-Improvement-Project | 
| Olympia,
                WA Thurston Co. United States | 18th Ave. SE / Fones Rd. SE (47.03250, -122.84697) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2010 | Double-right turn on north leg. October 2010. | 
| Tigard,
                OR Washington Co. United States | SW Bull Mountain Rd. / SW River Terrace Blvd. (45.41486, -122.84922) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 37.7271 | Other (At-Grade) Single-Lane | 2018 | ICD estimated from Google Maps linework. | 
| River Terrace,
                OR Washington Co. United States | SW River Terrace Blvd. / SW Appledale Rd. (45.42317, -122.84929) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 36.5760 | Other (At-Grade) Single-Lane | 2018 | |
| Olympia,
                WA Thurston Co. United States | 18th Ave. SE / Hoffman Rd. SE / Ontario St. SE (47.03250, -122.84959) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.8175 | Other (At-Grade) Single-Lane | 2010 | Opened October 2010. ICD estimated from Google Maps linework. | 
| Medford,
                OR Jackson Co. United States | Highland Dr. / Siskiyou Blvd. (42.32110, -122.84986) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 42.6720 | Other (At-Grade) Single-Lane | 2006 | Elliptical shaped. ICD = 140 ft x 125 ft. Fire station on south leg. | 
| Coquitlam,
                BC Greater Vancouver Canada | Woolridge St. / (parking lot) (49.23188, -122.85288) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 28.8561 | Other (At-Grade) Single-Lane | 2012 | Year Completed estimated (2011-2012). ICD estimated from Google Maps linework. | 
| Kalama,
                WA Cowlitz Co. United States | Kalama River Rd. / Old Hwy 99 (46.04277, -122.85420) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 45.7200 | Other (At-Grade) Single-Lane | 2020 | Year Completed estimated (2018-2021). | 
| Sherwood,
                OR Washington Co. United States | SW Meinecke Pkwy / SW Dewey Dr. (45.35897, -122.85650) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 31.8900 | Other (At-Grade) Single-Lane | 2003 | ICD estimated from Google Maps linework. | 
| Aloha,
                OR Washington Co. United States | SW 175th St. / SW Kemmer Rd. (45.45121, -122.85724) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 39.3785 | Other (At-Grade) Single-Lane | 2018 | ICD estimated from Google Maps linework. | 
| Sherwood,
                OR Washington Co. United States | Meinecke Pkwy. / Cedar Brook Way (45.36180, -122.85870) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 36.0842 | Other (At-Grade) Single-Lane | 2003 | ICD estimated from Google Maps linework. | 
| Lacey,
                WA Thurston Co. United States | Boulevard Rd. SE / 22nd Ave. (47.02903, -122.86477) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 97.6905 | Other (At-Grade) Single-Lane | 2014 | Right-turn-only lane on west leg. Elliptical shape. Open October 2014. ICD estimated from Google Maps linework. | 
| Olympia,
                WA Thurston Co. United States | Boulevard Rd. / Morse-Merryman Rd. SE (47.01817, -122.86518) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 38.2699 | Other (At-Grade) Single-Lane | 2018 | ICD estimated from Google Maps linework. | 
| Olympia,
                WA Thurston Co. United States | Boulevard Rd. SE / Log Cabin Rd. SE (47.01433, -122.86520) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.0870 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | Opened November 2009. Left-turn only lanes on north and south legs with spiralling. ICD estimated from Google Maps linework. | 
| Olympia,
                WA Thurston Co. United States | Yelm Hwy SE / Boulevard Rd. SE (47.00397, -122.86540) | Roundabout Existing | All-Way Yield Rectangular Rapid Flashing Beacon (RRFB) | 3 Approaches 1 Driveways 45.7200 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2011 | May 2011. Right-turn-only lane on north leg. Located about 1000 feet from Centennial Elementary School and serves as a walking and school bus route. | 
| Sherwood,
                OR Washington Co. United States | SW Elwert Rd. / SW Kruger Rd. / Cedar Ln. (45.35477, -122.86786) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2020 | Intersection of Kruger/Elwert was moved north a few hundred feet. That intersection was previously a two-way stop. | 
| Medford,
                OR Jackson Co. United States | E Main St. / E 8th St. (42.32781, -122.86861) | Other Existing | Uncontrolled None | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | Bicycle-only circular intersection. | |
| Healdsburg,
                CA Sonoma Co. United States | Healdsburg Ave. / Mill St. / Vine St. (38.60833, -122.87009) | Roundabout Existing | All-Way Yield Unknown | 5 Approaches 0 Driveways 36.3981 | Other (At-Grade) Single-Lane | 2018 | At-grade railroad crossing through central island. ICD estimated from Google Maps linework. | 
| Nice,
                CA Lake Co. United States | SR 20 / Pyle Rd. (39.13028, -122.87111) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 40.7641 | Other (At-Grade) Single-Lane | 2013 | ICD estimated from Google Maps linework. | 
| Olympia,
                WA Thurston Co. United States | Yelm Hwy SE / Brassfield Rd. SE (47.00372, -122.87309) | Roundabout Existing | All-Way Yield None | 3 Approaches 1 Driveways 45.7200 | Other (At-Grade) Multilane (2 Lane, 2x1 max) | 2011 | May 2011. | 
| Surrey,
                BC Greater Vancouver Canada | 125A St. / Station Rd. (49.10068, -122.87456) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 25.0000 | Other (At-Grade) Single-Lane | 2015 | |
| Kelso,
                WA Cowlitz Co. United States | SR 432 / Old Hwy 99 / I-5 NB Ramps / Kelso Dr. (46.10491, -122.87586) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 32.0040 | Freeway Ramps (Grade-Separated) Single-Lane | 2015 | Open August 2015. Elliptical shape. ICD = approximately 110 ft x 100 ft. | 
| Olympia,
                WA Thurston Co. United States | Henderson Blvd. SE / Carlyon Ave. SE (47.01989, -122.87768) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2020 | https://thejoltnews.com/stories/city-transportation-engineering-supervisor-explains-henderson-roundabout,267? | 
| Olympia,
                WA Thurston Co. United States | Eskridge Blvd. SE / Henderson Blvd. SE (47.02326, -122.87856) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2020 | https://thejoltnews.com/stories/city-transportation-engineering-supervisor-explains-henderson-roundabout,267? | 
| Medford,
                OR Jackson Co. United States | N Cottage St. / Ohio St. (42.34260, -122.88285) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 36.1932 | Other (At-Grade) Single-Lane | 2012 | Year Completed estimated (2011-2012). West leg religned to southwest 2016-2017. ICD estimated from Google Maps linework. 21442 | 
| Olympia,
                WA Thurston Co. United States | 14th Ave. SE / E Bay Dr. / Henderson Blvd. SE (47.02971, -122.89140) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 33.3772 | Other (At-Grade) Single-Lane | 2005 | Opened July 2005. Southbound right turn bypass lane. ICD estimated from Google Maps linework. | 
| Woodburn,
                OR Marion Co. United States | OR 219 / Butteville Rd. (45.15079, -122.89405) | Roundabout Existing | All-Way Yield Rectangular Rapid Flashing Beacon (RRFB) | 3 Approaches 0 Driveways 0.0000 | Other (At-Grade) Multilane (2 Lane, 2x1 max) | 2023 | Yield-controlled right-turn bypass lane on west leg. South leg realigned with roundabout. Serves large warehouse. | 
| Olympia,
                WA Thurston Co. United States | Jefferson St SE / 14th Ave. SE (47.03555, -122.89581) | Roundabout Existing | All-Way Yield Rectangular Rapid Flashing Beacon (RRFB) | 4 Approaches 0 Driveways 45.7200 | Other (At-Grade) Multilane (2 Lane, 2x2 max) | 2010 | Double-left turn from north leg; double-right turn from south leg. October 2010. | 
| Delta,
                BC Metro Vancouver Canada | 82nd Ave. / 116th St. (49.15220, -122.90150) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 21.0911 | Other (At-Grade) Unknown | 2005 | ICD estimated from Google Maps linework. | 
| Olympia,
                WA Thurston Co. United States | Capitol Way N / Market St. NE / Corky Ave. NW / (parking) (47.05005, -122.90244) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.0520 | Other (At-Grade) Single-Lane | 1995 | Painted splitter islands. June 1995. | 
| Burnaby,
                BC Greater Vancouver Regional District Canada | East Campus Rd. / University Dr. E (49.27628, -122.90450) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 40.0000 | Other (At-Grade) Single-Lane | 2003 | On the Simon Fraser University campus. Year Completed estimated (2002-2004). |