| City, 
                State County Country | Intersection (Lat, Lng) | Type Status | Control Type / Other Control Type | Approaches / Driveways / ICD (m) | Functional Class / LaneType | Year Completed | Comments | 
|---|---|---|---|---|---|---|---|
| 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. | 
| Fort Mill,
                SC York Co. United States | Assembly Dr. / First Baxter Crossing (35.02980, -80.96839) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 53.7889 | Other (At-Grade) Single-Lane | 2000 | Year Completed estimated (1998-2002). ICD estimated from Google Maps linework. | 
| Carmel,
                IN Hamilton Co. United States | Oakridge Rd. / Adios Pass (39.98876, -86.14577) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.6024 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Tallmadge,
                OH Summit Co. United States | Howe Rd. / Northeast Ave. / N Munroe Rd. (41.11800, -81.41503) | Roundabout Existing | Unknown Unknown | 6 Approaches 0 Driveways 52.1858 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2010 | Functional Class: Arterial ICD estimated from Google Maps linework. | 
| Kemptville,
                ON United Counties of Leeds and Grenville Canada | CR 43 / Pinehill Rd. (45.01836, -75.65872) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 32.0814 | Other (At-Grade) Single-Lane | 2009 | ICD estimated from Google Maps linework. | 
| Kemptville,
                ON United Counties of Leeds and Grenville Canada | CR 43 / (Colonnade entrance) (45.03069, -75.63316) | Roundabout Existing | All-Way Yield Unknown | 3 Approaches 0 Driveways 43.0473 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | ICD estimated from Google Maps linework. | 
| Odessa,
                ON Lennox and Addington Canada | CR 2 / CR 4 (44.26179, -76.77489) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 38.4898 | Other (At-Grade) Single-Lane | 2009 | ICD estimated from Google Maps linework. | 
| Carmel,
                IN Hamilton Co. United States | Oakridge Rd. / Bennett Rd. (39.99594, -86.14580) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.8536 | Other (At-Grade) Single-Lane | 2005 | ICD estimated from Google Maps linework. | 
| Baton Rouge,
                LA East Baton Rouge Par. United States | Lovett Rd. / (Magnolia Square subdivision) (30.52095, -91.03818) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 18.5192 | Other (At-Grade) Single-Lane | 2010 | ICD estimated from Google Maps linework. | 
| Anacortes,
                WA Skagit Co. United States | Pennsylvania Ave. / W 12th St. (48.49817, -122.65669) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways | Other (At-Grade) Single-Lane | 2010 | Built for the purpose of traffic calming near a residential park area. Concrete-asphalt. | 
| Princeton Junction,
                NJ Mercer Co. United States | Post Rd. / Alexander Rd. (40.31186, -74.62854) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 29.1429 | Other (At-Grade) Single-Lane | 2009 | Previously controlled by one-way stop ICD estimated from Google Maps linework. | 
| Azusa,
                CA Los Angeles Co. United States | Sierra Madre Ave. / Vosberg Dr. (34.14674, -117.90260) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.5835 | Other (At-Grade) Single-Lane | 2008 | Built near a single-family housing project that was previously a large nursery. ICD estimated from Google Maps linework. | 
| Azusa,
                CA Los Angeles Co. United States | Sierra Madre Ave. / Macneil Dr. (34.14662, -117.89040) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.5835 | Other (At-Grade) Single-Lane | 2008 | Built on single-family home project that was previously a large nursery. ICD estimated from Google Maps linework. | 
| Azusa,
                CA Los Angeles Co. United States | The Promenade / (unknown) (34.13805, -117.89310) | Other Existing | Unknown None | 3 Approaches 0 Driveways 34.5986 | Other (At-Grade) Single-Lane | 2008 | ICD estimated from Google Maps linework. | 
| Champaign,
                IL Champaign Co. United States | English Oak Dr. / (unknown) (40.10075, -88.32784) | Roundabout Existing | All-Way Yield Unknown | 4 Approaches 0 Driveways 28.3203 | Other (At-Grade) Single-Lane | 2007 | ICD estimated from Google Maps linework. | 
| West Valley,
                UT Salt Lake Co. United States | Lake Park Blvd. / Daybury Dr. (40.71107, -112.02180) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 53.3400 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2008 | |
| West Valley,
                UT Salt Lake Co. United States | Lake Park Blvd. / Highbury Pkwy. (40.71235, -112.01350) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 64.0080 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2008 | |
| West Valley,
                UT Salt Lake Co. United States | Lake Park Blvd. / S 4800 W (40.71236, -112.00900) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 52.5070 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2008 | ICD estimated from Google Maps linework. | 
| West Valley,
                UT Salt Lake Co. United States | Daybury Dr. / Highbury Pkwy. (40.70805, -112.02010) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 47.2440 | Other (At-Grade) Single-Lane | 2008 | |
| West Jordan,
                UT Salt Lake Co. United States | 4800 W / 7600 S (40.61269, -112.00540) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 30.8260 | Other (At-Grade) Single-Lane | 2008 | Fourth leg added. Previously controlled by one-way stop ICD estimated from Google Maps linework. | 
| Rome,
                NY Oneida Co. United States | SR 825 / Ellsworth Rd. (43.21731, -75.41796) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 55.7044 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2002 | Constructed in old air force base. ICD estimated from Google Maps linework. | 
| Corning,
                NY Steuben Co. United States | Robert Dann Blvd. / Aurene Dr. / Creekside Dr. (42.16506, -77.11484) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 40.7216 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2003 | Access permits for research and development plant. ICD estimated from Google Maps linework. | 
| San Clemente,
                CA Orange Co. United States | Calle Las Bolsa / Boca de la Playa (33.43215, -117.63000) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 22.9244 | Other (At-Grade) Single-Lane | 2006 | Functional Class: Local ICD estimated from Google Maps linework. | 
| Dover,
                DE Kent Co. United States | Mifflin Rd. / Woodmill Dr. (39.15527, -75.55831) | Traffic Calming Circle Existing | All-Way Yield None | 3 Approaches 0 Driveways | Other (At-Grade) Single-Lane | 2005 | Painted splitter islands. | 
| Redmond,
                WA King Co. United States | Eastridge Dr. NE / 244th Pl. NE (47.68499, -122.01300) | Roundabout Existing | All-Way Yield None | 3 Approaches 1 Driveways 16.8846 | Other (At-Grade) Single-lane w/ Traversable Central Island | 2014 | Open July 2014. ICD estimated from Google Maps linework. | 
| Cheektowaga,
                NY Erie Co. United States | Harlem Rd. / Cleveland Dr. (42.94493, -78.78408) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 44.5872 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2008 | ICD estimated from Google Maps linework. | 
| Round Lake,
                NY Saratoga Co. United States | Rte. 9-Rte. 67 / Round Lake Bypass (42.94849, -73.78979) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 52.4525 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2009 | ICD estimated from Google Maps linework. | 
| Lackawanna,
                NY Erie Co. United States | McKinley Pkwy. / Dorrance Ave. / Vincent Ave. (42.83200, -78.81520) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 30.6551 | Other (At-Grade) Single-Lane | 2010 | Restriped as single-lane roundabout. ICD estimated from Google Maps linework. | 
| Lackawanna,
                NY Erie Co. United States | McKinley Pkwy. / Choate Ave. / Red Jacket Pkwy. (42.84436, -78.81496) | Other Existing | Unknown Unknown | 5 Approaches 0 Driveways 138.3584 | Other (At-Grade) Single-Lane | ICD estimated from Google Maps linework. | |
| Lackawanna,
                NY Erie Co. United States | Dorrance Ave. / S. Shore Blvd. / Ward Ct. (42.83199, -78.80859) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 35.0345 | Other (At-Grade) Single-Lane | 2010 | Restriped as single-lane roundabout. ICD estimated from Google Maps linework. | 
| Casper,
                WY Natrona Co. United States | Centennial Hills Blvd. / Waterford St. (42.83014, -106.26682) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 41.1480 | Other (At-Grade) Single-Lane | 2005 | Year Completed estimated (2004-2006). South leg added 2009-2012. | 
| Batavia,
                NY Genesee Co. United States | Rte 33 / Rte 98 (42.99869, -78.19249) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 40.1808 | Other (At-Grade) Single-Lane | 2010 | ICD estimated from Google Maps linework. | 
| Chatham,
                NY Columbia Co. United States | Rte 66 / Rte 295 (42.36392, -73.59497) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 22.9441 | Other (At-Grade) Single-Lane | 2009 | Small single-laner in village setting. ICD estimated from Google Maps linework. | 
| Ithaca,
                NY Tompkins Co. United States | Spencer St. / Elmira Rd. / Park St. / Albany St. (42.43167, -76.50152) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 34.3790 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Greenwich,
                NY Washington Co. United States | Rte 29 / Rte 40 (43.10361, -73.51842) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 38.3681 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Plattsburgh,
                NY Clinton Co. United States | Rte 9 / New York Rd. / Vermont St. (44.68128, -73.44769) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 37.3649 | Other (At-Grade) Single-Lane | 2004 | ICD estimated from Google Maps linework. | 
| Liberty,
                NY Sullivan Co. United States | Rte 17 SB Ramps / Rte 52 (41.79303, -74.73518) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 32.9463 | Other (At-Grade) Single-Lane | 2006 | ICD estimated from Google Maps linework. | 
| Liberty,
                NY Sullivan Co. United States | Rte 52 / Rte 55 (41.79688, -74.74020) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 30.2731 | Other (At-Grade) Single-Lane | 2006 | ICD estimated from Google Maps linework. | 
| Cortlandt Manor,
                NY Northern Westchester Co. United States | Oregon Rd. / Jay Rd. / Westbrook Ct. (41.32445, -73.88305) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 30.4953 | Other (At-Grade) Single-Lane | 2006 | ICD estimated from Google Maps linework. | 
| Mount Vernon,
                NY Westchester Co. United States | Lincoln Ave. / Gramatan Ave. (40.91744, -73.83753) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.1000 | Other (At-Grade) Single-Lane | 2006 | Central island has fountain and music ICD estimated from Google Maps linework. | 
| Caledonia,
                NY Livingston Co. United States | Rte 5 / Rte 383 (42.97311, -77.85300) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 27.0896 | Other (At-Grade) Single-Lane | 2005 | Resigned and restriped traffic circle. Previously controlled by circle ICD estimated from Google Maps linework. | 
| Stony Brook,
                NY Suffolk Co. United States | S. Loop Rd. / Marburger Dr. (40.90982, -73.12318) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 36.1041 | Other (At-Grade) Single-Lane | 2006 | On college campus roadway. ICD estimated from Google Maps linework. | 
| Westchester,
                NY Westchester Co. United States | Airport Rd. / Rye Lake Rd. (41.07284, -73.70593) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 31.5131 | Other (At-Grade) Single-Lane | 2006 | Access to airport. ICD estimated from Google Maps linework. | 
| Westhampton Beach,
                NY Suffolk Co. United States | Potunk Ln. / Oak St. / School St. / Brook Rd. / Mill Rd. (40.81412, -72.64636) | Roundabout Existing | All-Way Yield None | 6 Approaches 0 Driveways 39.7720 | Other (At-Grade) Single-Lane | 2006 | Oval shape. ICD estimated from Google Maps linework. | 
| Poughkeepsie,
                NY Dutchess Co. United States | Rte 376 / Vassar Lake Dr. (41.68654, -73.89823) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 18.7303 | Other (At-Grade) Single-Lane | 2006 | Near Vassar College ICD estimated from Google Maps linework. | 
| Poughkeepsie,
                NY Dutchess Co. United States | Rte 376 / College Ave. (41.68975, -73.89973) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 26.7562 | Other (At-Grade) Single-Lane | 2006 | Near Vassar College ICD estimated from Google Maps linework. | 
| Poughkeepsie,
                NY Dutchess Co. United States | Rte 376 / Collegeview Ave. (41.69179, -73.90046) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 30.3227 | Other (At-Grade) Single-Lane | 2008 | Near Vassar College ICD estimated from Google Maps linework. | 
| Glens Falls,
                NY Warren Co. United States | Rte 9 / Rte 9L / Hudson St. (43.30951, -73.64399) | Roundabout Existing | All-Way Yield None | 5 Approaches 0 Driveways 36.5760 | Other (At-Grade) Single-Lane | 2007 | Urban, downtown environment. Symbolic black-on-orange 540-degree turn sign for trucks to make right turn around central island from south leg to southeast leg. | 
| Niagara Falls,
                NY Niagara Co. United States | Rainbow Blvd. / 1st St. (43.08466, -79.06161) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 32.2741 | Other (At-Grade) Single-Lane | 2007 | ICD estimated from Google Maps linework. | 
| East Aurora,
                NY Erie Co. United States | Rte 20A / Rte 78 (42.76773, -78.62917) | Roundabout Existing | All-Way Yield None | 3 Approaches 1 Driveways 38.1000 | Other (At-Grade) Single-Lane | 2009 | Converted from rotary. | 
| Cheektowaga,
                NY Erie Co. United States | Harlem Rd. / Kensington Rd. / Lexington Ter. (42.95023, -78.78391) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 29.7223 | Other (At-Grade) Single-Lane | 2008 | Closely spaced roundabouts 100 feet apart. ICD estimated from Google Maps linework. | 
| Cheektowaga,
                NY Erie Co. United States | Harlem Rd. / Kensington Rd. / Wehrle Dr. (42.94968, -78.78409) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 41.0870 | Other (At-Grade) Single-Lane | 2008 | Closely spaced roundabouts 100 feet apart. ICD estimated from Google Maps linework. | 
| Irondequoit,
                NY Monroe Co. United States | Rte 590 / Titus Ave. (43.21195, -77.54978) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 38.3001 | Other (At-Grade) Single-Lane | 2010 | Series of 4 roundabouts. ICD estimated from Google Maps linework. | 
| Irondequoit,
                NY Monroe Co. United States | Rte 590 / Seneca Rd. (43.21642, -77.54655) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 38.2973 | Other (At-Grade) Single-Lane | 2010 | Series of 4 roundabouts. ICD estimated from Google Maps linework. | 
| Irondequoit,
                NY Monroe Co. United States | Rte 590 / Point Pleasant Rd. (43.22389, -77.54493) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 38.2926 | Other (At-Grade) Single-Lane | 2010 | Series of 4 roundabouts. ICD estimated from Google Maps linework. | 
| Irondequoit,
                NY Monroe Co. United States | Rte 590 / Durand Blvd. (43.22728, -77.54431) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 36.5500 | Other (At-Grade) Single-Lane | 2010 | Series of 4 roundabouts. ICD estimated from Google Maps linework. | 
| Rochester,
                NY Monroe Co. United States | Plymouth Ave. / Ford St. (43.14373, -77.61810) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 33.5280 | Other (At-Grade) Single-Lane | 2005 | Raised crosswalks on southwest and southeast legs (added 2017-2021). Year Completed estimated (2005-2006). | 
| Bainbridge,
                NY Chenango Co. United States | Rte 206 / CR 39 (42.29073, -75.47471) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 33.5727 | Other (At-Grade) Single-Lane | 2007 | ICD estimated from Google Maps linework. | 
| Latham,
                NY Albany Co. United States | Old Wolf Rd. / Old Niskayuna Rd. (42.73882, -73.79072) | Roundabout Existing | All-Way Yield None | 4 Approaches 0 Driveways 29.8241 | Other (At-Grade) Single-Lane | 2008 | ICD estimated from Google Maps linework. | 
| North Providence,
                RI Providence Co. United States | US 44 / Centerdale Bypass (41.85703, -71.48295) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 30.2447 | Other (At-Grade) Single-Lane | 2002 | ICD estimated from Google Maps linework. | 
| Lincoln,
                RI Providence Co. United States | Twin River Rd. / (unknown) (41.89224, -71.45074) | Roundabout Existing | All-Way Yield None | 3 Approaches 0 Driveways 47.1202 | Other (At-Grade) Multilane (2 Lane, unspecified) | 2006 | 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. | 
| 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. |