Washington County, Ohio
County seat: Marietta · Population 58,389 (2025) · 632 sq mi
Washington County is the 44th most populous of Ohio's 88 counties, with 58,389 people (2025 estimate). Its county seat is Marietta. The map shows its 7 cities and towns and the 7 neighboring counties.
Washington County facts
- County seat
- Marietta
- Population (2025 estimate)
- 58,389 −2.3% since 2020
- Land area
- 632 sq mi 5th largest of 88
- Water area
- 8 sq mi
- Population density
- 92 per sq mi
- Established
- 1788
- Named after
- George Washington Founding Father and first U.S. president (1732–1799)
- Largest city
- Marietta 13,053
- Median household income
- $63,603
- Cities and towns
- 7 plus 6 CDPs
- ZIP codes
- 21
- Time zone
- Eastern
- FIPS code
- 39167
Cities and towns in Washington County
Washington County has 7 incorporated cities, towns and villages. Populations count the people living inside Washington County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Marietta (county seat) | City | 13,053 | |
| Belpre | City | 6,657 | |
| Beverly | Village | 1,200 | |
| New Matamoras | Village | 690 | |
| Lowell | Village | 552 | |
| Macksburg | Village | 114 | |
| Lower Salem | Village | 72 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Devola | 2,688 | |
| Newport | 1,180 | |
| Reno | 1,040 | |
| Waterford | 395 | |
| Little Hocking | 167 | |
| Vincent | 139 |
ZIP codes in Washington County
21 ZIP codes reach into Washington County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 43787 also Morgan County
- 45711 also Athens and Morgan counties
- 45714
- 45715 also Morgan and Noble counties
- 45721
- 45723 also Athens and Meigs counties
- 45724
- 45727 also Noble County
- 45729
- 45742 also Athens County
- 45744 also Noble County
- 45745 also Noble and Monroe counties
- 45746 also Noble County
- 45750
- 45767 also Monroe County
- 45768
- 45773
- 45784
- 45786 also Morgan County
- 45788
- 45789 also Monroe County
Population of Washington County, 2020–2025
Washington County shrank by 1,384 people (−2.3%) between April 2020 and July 2025: 1,542 more deaths than births and a net gain of 148 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 59,657 |
| 2021 | 59,485 |
| 2022 | 58,890 |
| 2023 | 58,637 |
| 2024 | 58,599 |
| 2025 | 58,389 |
Neighboring counties
- Wood County, West Virginia south · 82,385 people
- Morgan County northwest · 13,626 people
- Noble County north · 14,276 people
- Athens County west · 63,197 people
- Monroe County northeast · 12,994 people
- Pleasants County, West Virginia east · 7,338 people
- Tyler County, West Virginia east · 7,881 people
Printable Washington County map
The PDF is a vector file with real text: it prints sharp on Letter paper and you can search it for a town. The PNG is 2400 pixels wide for slides and documents. Both are free to use with a credit to WhichCounty.
- PDF (Letter) (110 KB)
- PNG (2400 px) (91 KB)
Paste this code to embed the map on your site:
Sources
- Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files (1:500,000).
- Population: Census Bureau county and city estimates, Vintage 2025. CDP populations: American Community Survey 2020–2024.
- Places and ZIP codes: Census Bureau 2026 Gazetteer and 2020 ZIP Code Tabulation Area relationship files.
- County seat, founding year and name origin: Wikidata (CC0), checked against state sources.
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