| City, 
                State County Country | Intersection (Lat, Lng) | Type Status | Control Type / Other Control Type | Approaches / Driveways / ICD (m) | Functional Class / LaneType | Year Completed | Comments | 
|---|---|---|---|---|---|---|---|
| Anacortes,
                WA Skagit Co. United States | Commercial Ave. / SR20 Spur (48.49332, -122.61280) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 34.8256 | Other (At-Grade) Single-Lane | 2009 | ICD estimated from Google Maps linework. | 
| Sammamish,
                WA King Co. United States | 244th Ave NE / NE 8th St (47.61673, -122.01390) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.0083 | Other (At-Grade) Single-Lane | 2010 | ICD estimated from Google Maps linework. | 
| Sammamish,
                WA King Co. United States | 244th Ave. NE / E Main Dr. (47.60881, -122.01390) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 22.5457 | Other (At-Grade) Single-Lane | 2010 | ICD estimated from Google Maps linework. | 
| Wenatchee,
                WA Chelan Co. United States | Riverside Dr. / 5th St. (47.43215, -120.31267) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 25.0455 | Other (At-Grade) Single-Lane | 2009 | October 2009. ICD estimated from Google Maps linework. | 
| 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. | 
| 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. | 
| Granite Falls,
                WA Snohomish Co. United States | Granite Falls Access Rd. / Burn Rd. (NE 100th St.) (48.08656, -121.99060) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 38.2954 | Other (At-Grade) Single-Lane | 2010 | November 2010. ICD estimated from Google Maps linework. | 
| Granite Falls,
                WA Snohomish Co. United States | Granite Falls Access Rd. / Jordan Rd (48.09135, -121.97980) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 55.0445 | Other (At-Grade) Single-Lane | 2010 | November 2010. ICD estimated from Google Maps linework. | 
| Granite Falls,
                WA Snohomish Co. United States | Granite Falls Access Rd. / SR 92 (48.08332, -121.99000) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 38.2978 | Other (At-Grade) Single-Lane | 2010 | May 2010. ICD estimated from Google Maps linework. | 
| Lake Stevens,
                WA Snohomish Co. United States | Lundeen Parkway / Soper Hill Rd. (48.01557, -122.10010) | Roundabout Existing | Unknown Unknown | 4 Approaches 0 Driveways 29.5601 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2010 | ICD estimated from Google Maps linework. | 
| Issaquah,
                WA King Co. United States | East Lake Sammamish Parkway / SE 43rd Way (47.56792, -122.05500) | Roundabout Existing | Unknown Unknown | 3 Approaches 0 Driveways 38.6799 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | ICD estimated from Google Maps linework. | 
| Auburn,
                WA King Co. United States | 124 Ave. SE / SE 304th St. (47.32978, -122.17640) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.1891 | Other (At-Grade) Single-Lane | 2008 | July 2008. 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. | 
| 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. | 
| Blaine,
                WA Whatcom Co. United States | SR 548 (Grandview Rd.) / Blaine Rd. / (parking) (48.89206, -122.72655) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 38.1000 | Other (At-Grade) Single-Lane | 2010 | September 2010. Merging right-turn bypass lane on south leg. Right-turn-oinly lane on north leg. | 
| Bremerton,
                WA Kitsap Co. United States | Cross SKIA Connector / Harry Earl Rd. (47.50340, -122.75060) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 32.2730 | Other (At-Grade) Single-Lane | 2010 | September 2010. ICD estimated from Google Maps linework. | 
| Burlington,
                WA Skagit Co. United States | N Burlington Blvd. / (parking) (48.48060, -122.33544) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 45.7200 | Other (At-Grade) Multilane (2 Lane, 2x1 max) | 2008 | October 2008. Entrance to high school. | 
| Burlington,
                WA Skagit Co. United States | SR 11 (Chuckanut Dr.) / I-5 SB Ramps / Josh Wilson Rd. (48.48585, -122.33867) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.6240 | Freeway Ramps (Grade-Separated) Single-Lane | 2010 | Right-turn-only lanes on east and west legs. Replaced two T-intersections. September 2010. | 
| Burlington,
                WA Skagit Co. United States | SR 11 (Chuckanut Dr.) / I-5 NB Ramps / Old Hwy 99 (48.48359, -122.33559) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.6240 | Freeway Ramps (Grade-Separated) Single-Lane | 2010 | October 2010. Right-turn-only lanes on south and east legs. Merging right-turn-bypass lane on west leg. | 
| Covington,
                WA King Co. United States | 168th Pl. SE / Fred Meyer Entrance (47.35698, -122.11680) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 105.1794 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2008 | November 2008. Entrance into Fred Meyer shopping center. ICD estimated from Google Maps linework. | 
| Covington,
                WA King Co. United States | 168th Pl. SE / Costco Entrance (47.35463, -122.11860) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.6463 | Other (At-Grade) Single-Lane | 2008 | November 2008. Entrance into Costco shopping center. ICD estimated from Google Maps linework. | 
| Covington,
                WA King Co. United States | SE Wax Rd. / 180th Ave. SE / SE 267th Pl. (47.36216, -122.10200) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 53.3935 | Other (At-Grade) Single-Lane | 2008 | September 2008. ICD estimated from Google Maps linework. | 
| Deer Park,
                WA Spokane Co. United States | S Main St. / W H St. / E H St. (47.94695, -117.47693) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 30.4800 | Other (At-Grade) Single-Lane | 2010 | October 2010. Broke ground July 26, 2010. | 
| Deer Park,
                WA Spokane Co. United States | E Crawford Ave. / Weber Rd. (47.95444, -117.45384) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 41.1480 | Other (At-Grade) Single-Lane | 2009 | September 2009. | 
| Federal Way,
                WA King Co. United States | S 333rd St. / Community Center Entrance (47.30548, -122.32380) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 29.1550 | Other (At-Grade) Single-Lane | 2006 | January 2006. ICD estimated from Google Maps linework. | 
| Gig Harbor,
                WA Thurston Co. United States | Harbor Hill Dr. / (parking) (47.35845, -122.60116) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 45.7200 | Other (At-Grade) Multilane (2 Lane, 2x1 max) | 2008 | January 2008. | 
| 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 | (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. | 
| Lake Stevens,
                WA Snohomish Co. United States | (unknown) (48.01194, -122.04305) | Roundabout Existing | All-Way Yield None | 2 Approaches 0 Driveways 30.4800 | Other (At-Grade) Single-Lane | 2009 | Entrance to Lake Stevens Community Park. January 2009. | 
| Lynnwood,
                WA Snohomish Co. United States | Ash Way / 18th Ave. SW (47.85489, -122.25737) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 35.0520 | Other (At-Grade) Single-Lane | 2009 | October 2009. | 
| Maple Valley,
                WA King Co. United States | Witte Rd. SE / SE 248th St. (47.37966, -122.04813) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.5760 | Other (At-Grade) Single-Lane | 2011 | January 2011. | 
| Monroe,
                WA Snohomish Co. United States | Country Crescent SE / County Crescent SE (47.86547, -121.96140) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 30.4800 | Other (At-Grade) Single-Lane | 2002 | July 2002. | 
| Mount Vernon,
                WA Skagit Co. United States | Best Rd. / McLean Rd. (48.42070, -122.44380) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 32.4976 | Other (At-Grade) Single-Lane | 2009 | April 2009. On high-speed rural roadways. ICD estimated from Google Maps linework. | 
| North Bend,
                WA King Co. United States | E North Bend Way / SE Cedar Falls Way / (parking) (47.49096, -121.77876) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 42.6720 | Other (At-Grade) Single-Lane | 2008 | August 2008. | 
| 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. | 
| 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 | 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. | 
| 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. | 
| 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. | 
| 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. | 
| 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. | 
| Redmond,
                WA King Co. United States | Eastridge Dr. NE / NE Cedar Park Crescent (47.69141, -122.01690) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 33.5280 | Other (At-Grade) Single-Lane | 2012 | |
| 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. | 
| 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. | 
| Puyallup,
                WA Pierce Co. United States | 15th Ave. SE / 3rd St. SE (47.17741, -122.29100) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 32.0040 | Other (At-Grade) Single-Lane | 2010 | June 2010. | 
| Redmond,
                WA King Co. United States | 152nd Ave. NE / NE 36th Pl. / NE 31st St. (47.63828, -122.13550) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 27.3615 | Other (At-Grade) Single-Lane | 2010 | Near Microsoft campus. Moderate ped/bike volumes. ICD estimated from Google Maps linework. | 
| Renton,
                WA King Co. United States | N 10th St. / N 10th Pl. (47.49781, -122.20468) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.5280 | Other (At-Grade) Single-Lane | 2008 | June 2008. | 
| Richland,
                WA Benton Co. United States | Lee Blvd. / The Parkway (46.27484, -119.27433) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 25.9080 | Other (At-Grade) Single-Lane | 2002 | No splitter islands on north and south legs. Year Completed estimated (1996-2003). | 
| Sedro-Woolley,
                WA Skagit Co. United States | SR 9-SR 20 (Cascade Loop) / Patrick St. / Skagit Way (48.51051, -122.24156) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.5760 | Other (At-Grade) Single-Lane | 2009 | Elliptical shaped. ICD = 120 ft x 105 ft. August 2009. ICD estimated from Google Maps linework. | 
| Selah,
                WA Yakima Co. United States | Gore Rd. / Selah Loop Rd. (46.67943, -120.53061) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 38.1000 | Other (At-Grade) Single-Lane | 2008 | August 2008. Replaced triangle intersection. | 
| Sequim,
                WA Clallam Co. United States | W Washington St. / S 9th Ave. (48.07909, -123.12400) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2007 | May 2007. | 
| Snoqualmie,
                WA King Co. United States | North Bend Way / (Snoqualmie Casino entrance) (47.51671, -121.84100) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 33.5280 | Other (At-Grade) Multilane (2 Lane, 2x1 max) | 2008 | Through bypass lane on west leg. October 2008. ICD estimated from Google Maps linework. | 
| Spokane,
                WA Spokane Co. United States | W Pacific Ave. / S Cannon St. (47.65555, -117.44160) | Traffic Calming Circle Existing | All-Way Yield None | 4 Approaches 0 Driveways 0.0000 | Other (At-Grade) Single-Lane | 2006 | No splitter islands on north and south legs. Pedestrian crossings within circulatory roadway. April 2006. | 
| Spokane Valley,
                WA Spokane Co. United States | E Montgomery Dr. / E Mansfield Ave. (47.67753, -117.24790) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2009 | April 2009. | 
| Spokane Valley,
                WA Spokane Co. United States | Flora Rd. / E Mission Ave. / E Indiana Pkwy. - E Mission Pkwy. (47.67154, -117.17516) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 38.1000 | Other (At-Grade) Single-Lane | 2010 | E Indiana Pkwy is west leg entrance; E Mission Pkwy is west leg exit. November 2010. | 
| Tumwater,
                WA Thurston Co. United States | Littlerock Rd. SW / Tumwater Blvd. SW (46.98283, -122.93544) | Roundabout Existing | All-Way Yield None | 3 Approaches 1 Driveways 45.7200 | Other (At-Grade) Multilane (2 Lane, 2x1 max) | 2009 | July 2009. | 
| Tumwater,
                WA Thurston Co. United States | Littlerock Rd. SW / Israel Rd. SW / 70th Ave. SW (46.98554, -122.93236) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 38.1000 | Other (At-Grade) Multilane (2 Lane, 2x1 max) | 2009 | October 2009. | 
| Tumwater,
                WA Thurston Co. United States | Littlerock Rd. SW / Odegard Rd. SW (46.98985, -122.92650) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 36.5760 | Other (At-Grade) Single-Lane | 2010 | June 2010. | 
| Tumwater,
                WA Thurston Co. United States | Littlerock Rd. SW / Kingswood Dr. SW (46.99435, -122.92190) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 42.6720 | Other (At-Grade) Multilane (2 Lane, 2x1 max) | 2010 | September 2010. | 
| Vancouver,
                WA Clark Co. United States | NE 10th Ave. / NE 136th St. / Clark Ave. (45.71980, -122.66037) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 39.6240 | Other (At-Grade) Single-Lane | 2011 | Clark Ave. is one way exit. May 2011. | 
| Walla Walla,
                WA Walla Walla Co. United States | Myra Rd. / W Pine St. / Heritage Rd. (46.06841, -118.36972) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 56.3880 | Other (At-Grade) Multilane (2 Lane, 2x1 max) | 2008 | December 2008. | 
| Walla Walla,
                WA Walla Walla Co. United States | Myra Rd. / SR 12 EB Ramps (46.06933, -118.36979) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 39.6240 | Freeway Ramps (Grade-Separated) Single-Lane | 2010 | Raindrop shaped. July 2010. ICD estimated from Google Maps linework. | 
| Walla Walla,
                WA Walla Walla Co. United States | Myra Rd. / SR 12 WB Ramps (46.07040, -118.36987) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 38.1000 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) | 2010 | Raindrop shaped. July 2010. | 
| Wenatchee,
                WA Chelan Co. United States | Riverside Dr. / Island View (47.43461, -120.31477) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 19.8120 | Other (At-Grade) Single-Lane | 2009 | Painted splitter islands. October 2009. | 
| East Wenatchee,
                WA Douglas Co. United States | Grant Rd. / Airport Way / Urban Industrial Dr. (47.40592, -120.20780) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 45.7200 | Other (At-Grade) Single-Lane | 2010 | Add-lane right-turn bypass lanes on north and west legs. July 2010. | 
| Woodinville,
                WA King Co. United States | SR 202 / NE 145th St. / 148th Ave. NE (47.73271, -122.14220) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 47.2440 | Other (At-Grade) Multilane (2 Lane, 2x1 max) | 2009 | October 2009. | 
| Woodinville,
                WA King Co. United States | SR 202 / Village Dr. / NE 144th St. (47.73111, -122.14040) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 38.4048 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | Constructed as single-lane roundabout in October 2009 and expanded to include second lane northbound in 2021. | 
| Woodinville,
                WA King Co. United States | SR 202 / (parking) (47.73280, -122.14400) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.5280 | Other (At-Grade) Single-Lane | 2009 | October 2009. | 
| Woodland,
                WA Cowlitz Co. United States | Insel Rd. / Willow St. (45.92237, -122.73400) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.0520 | Other (At-Grade) Single-Lane | 2009 | June 2009. | 
| 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 | |
| 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. | 
| 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. | 
| Kennewick,
                WA Benton Co. United States | Ridgeline Dr. / Southridge Blvd. (46.17550, -119.19750) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.3887 | Other (At-Grade) Single-Lane | 2013 | Functional Class: Collector ICD estimated from Google Maps linework. | 
| Kennewick,
                WA Benton Co. United States | Ridgeline Dr. / Plaza Way (46.17430, -119.19500) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 43.0057 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2013 | Functional Class: Collector ICD estimated from Google Maps linework. | 
| Kennewick,
                WA Benton Co. United States | Hildebrand Blvd. / Zintel Way (46.17690, -119.18380) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 43.8307 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | Off US 395 to serve frontage road for development. Functional Class: Collector ICD estimated from Google Maps linework. | 
| Richland,
                WA Benton Co. United States | Clearwater Blvd. / Leslie Rd. / Badger Rd. (46.19620, -119.26590) | Roundabout Existing | All-Way Yield At-grade Rail Crossing Signals/Gates (controlling approach only) | 4 Approaches 0 Driveways 54.8640 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | Railroad tracks approximately 160 feet from roundabout entry on west leg (Leslie Road). Opened August 2009. | 
| 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. | 
| 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. / 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. | 
| Federal Way,
                WA King Co. United States | S 308th St. / 14th Ave. S (47.32601, -122.31601) | Roundabout Existing | All-Way Yield Rectangular Rapid Flashing Beacon (RRFB) | 4 Approaches 0 Driveways 19.5072 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2014 | This is a mini-roundabout with fully traversable center island. Inscribed diameter is about 64 feet, opened in August 2014. An RRFB is present at the school crossing on the east leg; the previous raised crosswalk was removed. The north leg is a driveway to the newly remodeled high school. Both streets are Minor Collectors with 25 mph speed limits. | 
| Federal Way,
                WA King Co. United States | 3rd Ave. SW / SW 330th St. (47.30636, -122.33874) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 17.8167 | Other (At-Grade) Single-Lane | 2014 | This is a "Compact" single-lane roundabout with center island landscaping and a truck apron, inscribed circle diameter is 76 feet. Pedestrian refuge islands on the east-west approaches provide channelization. ICD estimated from Google Maps linework. | 
| Federal Way,
                WA King Co. United States | SW 330th St. / 6th Ave. SW (47.30622, -122.34230) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 20.2463 | Other (At-Grade) Single-Lane | 2014 | This is a "Compact" urban roundabout with central island landscaping and a truck apron, inscribed diameter is 76 feet. Pedestrian refuge islands on the east-west approaches provide channelization. This and the one at 3rd Ave SW / SW 330th Street were opened in November 2014. ICD estimated from Google Maps linework. | 
| Federal Way,
                WA King Co. United States | 12th Ave. SW / 12th Pl. SW / SW 340th St. (47.29677, -122.35142) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 18.6299 | Other (At-Grade) Single-Lane | 2013 | Inscribed diameter of 76 feet, landscaped central island, yield control on all approaches. No curbing for channelizing the approaches, paint only. Opened November 2013. ICD estimated from Google Maps linework. | 
| Kent,
                WA King Co. United States | SE 244th St. / 100th Ave. SE (47.38335, -122.20736) | Traffic Calming Circle Existing | Other None | 4 Approaches 0 Driveways 11.3213 | Other (At-Grade) Single-Lane | 2016 | This is now a dog bone-shaped traffic circle with two-way Yield control on the east and west approaches and no control north-south. Previous control was stop-control on the east leg only before the west leg was built. ICD estimated from Google Maps linework. | 
| Chehalis,
                WA Lewis Co. United States | NW West St. / NW Pennsylvania Ave. (46.66652, -122.97639) | Traffic Calming Circle Existing | One-Way/Two-Way Stop None | 4 Approaches 0 Driveways | Other (At-Grade) Unknown | 2008 | Year Completed estimated (2006-2009). | 
| Chehalis,
                WA Lewis Co. United States | NW Louisiana Ave. / Car Dealership Access (46.68261, -122.97338) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 38.5097 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2013 | ICD estimated from Google Maps linework. | 
| 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. | 
| Ridgefield,
                WA Clark Co. United States | NW 319th St. / NW 31st Ave. (45.85093, -122.70594) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 48.7680 | Other (At-Grade) Multilane (2 Lane, 2x1 max) | 2017 | Part of Ilani Casino interchange project. | 
| Ridgefield,
                WA Clark Co. United States | NW 319th St. / I-5 SB Ramps (45.85163, -122.70380) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 48.7680 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) | 2017 | Part of Ilani Casino interchange project. | 
| Ridgefield,
                WA Clark Co. United States | NW La Center Rd. / I-5 NB Ramps (45.85214, -122.70160) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 51.8160 | Freeway Ramps (Grade-Separated) Multilane (2 Lane, unspecified) | 2017 | Part of Ilani Casino interchange project. | 
| Camas,
                WA Clark Co. United States | NW 6th Ave. / SR 14 WB Ramps / NW Norwood St. (45.58216, -122.42684) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 44.1960 | Freeway Ramps (Grade-Separated) Single-Lane | 2016 | |
| 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. | 
| 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. | 
| 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 | Fort Vancouver Way. / Evergreen Blvd. (45.62863, -122.66310) | Other Existing | All-Way Stop Unknown | 4 Approaches 0 Driveways 40.0897 | Other (At-Grade) Single-Lane | 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. | 
| Bellingham,
                WA Whatcom Co. United States | Haxton Way / Kwina Rd. (48.79386, -122.63408) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 51.8160 | Other (At-Grade) Single-Lane | 2013 | Oblong shape. ICD = 170 ft x 135 ft. Open August 2013. Lummi Indian Reservation. | 
| 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. | 
| Bellingham,
                WA Whatcom Co. United States | Everson Goshen Rd. / E Smith Rd. (48.83263, -122.37755) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways | Other (At-Grade) Single-lane w/ Traversable Central Island | 2015 | Open June 2015. |