| means | c/Washington County, Maryland |
| means | c/Washington County, Mississippi |
| means | c/Washington County, Oklahoma |
| means | c/Washington County, Vermont |
| means | e/Washington County (PA) |
| means | e/Washington County, Arkansas |
| means | e/Washington County, CO |
| means | e/Washington County, Florida |
| means | e/Washington County, Illinois |
| means | e/Washington County, Indiana |
| means | e/Washington County, KS |
| means | e/Washington County, Kentucky |
| means | e/Washington County, ME |
| means | e/Washington County, Minnesota |
| means | e/Washington County, Missouri |
| means | e/Washington County, Nebraska |
| means | e/Washington County, New York |
| means | e/Washington County, North Carolina |
| means | e/Washington County, OR |
| means | e/Washington County, Oh |
| means | e/Washington County, Rhode Island |
| means | e/Washington County, TN |
| means | e/Washington County, Texas |
| means | e/Washington County, UT |
| means | e/Washington County, Virginia |
| means | e/Washington County, Wisconsin |
| means | e/Washington Parish, Louisiana |
| means | e/zh/華盛頓縣 (愛阿華州) |