Washington County, Ohio
Washington County is a county in Ohio. Its county FIPS code is 39167. Use the boundary map and neighboring areas below to check the jurisdiction you need.
- Official code
- 39167
- Representative coordinates
- 39.450676, -81.490636
- County type
- County
- County seat or government
- Marietta
- Resident population, July 2025
- 58,389
- Land area
- 1,637.293 km²
- Water area
- 20.665 km²
- State
- Ohio
The representative point identifies this area. It is not a street address or a boundary survey.
Time zones in Washington County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| America/New_York | UTC-05:00 in January; UTC-04:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Listed zones overlap the mapped area. A point lookup can distinguish sides of a boundary. Your device’s zone may differ.
Census ZIP areas
43787 · 45711 · 45714 · 45715 · 45721 · 45723 · 45724 · 45727 · 45729 · 45742 · 45744 · 45745 · 45746 · 45750 · 45767 · 45768 · 45773 · 45784 · 45786 · 45788 · 45789
These statistical areas overlap the boundary. They are not delivery assignments; confirm mailing details with USPS ZIP Code Lookup.
Official county information
Use the US government local-office directory ↗ to find the office responsible for your address. A county website has not been confidently matched here. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
Cities, towns and communities
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
Areas sharing the mapped boundary
These areas touch this mapped boundary.
Before using this answer on a form
Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.
Find the county at your current point, check its ZIP area, or find its physical time zone.