Washington County, Ohio ZIP codes
18 ZIP codes are in Washington County, plus 6 that cross in from neighboring counties. It's part of the Marietta, OH micro area.
- ZIP codes
- 18
- Population in these ZIPs
- 57,228
- Avg. median income
- $64,300population-weighted
- Cities & towns
- 18
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Washington County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 45712 PO Box | Barlow | — | — | — |
| 45713 PO Box | Bartlett | — | — | — |
| 45714 | Belpre | 9,503 | $56,574 | $183,100 |
| 45721 | Coal Run | 15 | — | — |
| 45724 | Cutler | 1,218 | $58,500 | $180,800 |
| 45729 | Fleming | 2,121 | $82,110 | $258,900 |
| 45742 | Little Hocking | 3,752 | $78,194 | $204,300 |
| 45744 | Lowell | 2,179 | $69,148 | $154,400 |
| 45746 | Macksburg | 329 | $65,161 | $109,700 |
| 45750 | Marietta | 26,420 | $60,229 | $188,400 |
| 45767 | New Matamoras | 2,428 | $42,813 | $117,100 |
| 45768 | Newport | 1,503 | $84,286 | $155,700 |
| 45773 | Reno | 600 | $69,848 | $205,800 |
| 45784 | Vincent | 3,002 | $82,713 | $247,900 |
| 45786 | Waterford | 3,187 | $70,917 | $197,600 |
| 45787 PO Box | Watertown | — | — | — |
| 45788 | Whipple | 691 | $100,682 | $195,600 |
| 45789 | Wingett Run | 280 | $81,649 | — |
ZIP codes partly in Washington County
These ZIP codes are mostly in a neighboring county but cover part of Washington County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 43787 | Stockport | Morgan County | 2,524 | $45,880 | $133,400 |
| 45711 | Amesville | Athens County | 1,244 | $79,464 | $189,900 |
| 45715 | Beverly | Morgan County | 2,006 | $47,176 | $169,800 |
| 45723 | Coolville | Athens County | 3,682 | $57,222 | $174,900 |
| 45727 | Dexter City | Noble County | 944 | $22,564 | $148,400 |
| 45745 | Lower Salem | Noble County | 1,049 | $44,250 | $140,100 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Washington County
Nearby counties
Frequently asked questions
How many ZIP codes are in Washington County, Ohio?
18 ZIP codes are mainly in Washington County, and 6 more ZIP codes from neighboring areas reach partly into it.
What cities are in Washington County?
ZIP codes in Washington County use the city names Barlow, Bartlett, Belpre, Coal Run, Cutler, Fleming, Little Hocking, Lowell, Macksburg, Marietta, New Matamoras and Newport and others.
What metro area is Washington County in?
Washington County is part of the Marietta, OH micropolitan statistical area.