All are named after George Washington. This must be the most popular county name in the United States of America.
- one of 67 counties in Alabama, with its county seat in Chatom.
- one of 75 counties in Arkansas, county seat Fayetteville.
- one of 64 counties in Colorado, county seat Akron.
- one of 67 counties in Florida, county seat Chipley.
- one of 159 counties in Georgia, county seat Sandersville.
- one of 44 counties in Idaho, county seat Weiser.
- one of 102 counties in Illinois, county seat Nashville.
- one of 92 counties in Indiana, county seat Salem.
- one of 99 counties in Iowa, county seat Washington.
- one of 105 counties in Kansas, county seat Washington.
- one of 120 counties in Kentucky, county seat Springfield.
- one of 16 counties in Maine, county seat Machias.
- one of 23 counties in Maryland, county seat Hagerstown.
- one of 87 counties in Minnesota, county seat Stillwater.
- one of 82 counties in Mississippi, county seat Greenville.
- one of 114 counties in Missouri, county seat Potosi.
- one of 93 counties in Nebraska, county seat Blair.
- one of 62 counties in New York, county seat Fort Edward.
- one of 100 counties in North Carolina, county seat Plymouth.
- one of 88 counties in Ohio, county seat Marietta.
- one of 77 counties in Oklahoma, county seat Bartlesville.
- one of 36 counties in Oregon, county seat Hillsboro.
- one of 67 counties in Pennsylvania, county seat Washington.
- one of 5 counties in Rhode Island, largest town South Kingstown.
- one of 95 counties in Tennessee, county seat Jonesborough.
- one of 254 counties in Texas, county seat Brenham.
- one of 29 counties in Utah, county seat St. George.
- one of 14 counties in Vermont, county seat Montpelier.
- one of 95 counties in Virginia, county seat Abingdon.
- one of 72 counties in Wisconsin, county seat West Bend.
- Washington Parish (in Louisiana)