| ZIP Codes: | 20 ZIP Codes (17 Standard, 3 PO Box, 0 Unique) [See All] |
| Area Codes: | 220 / 740 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:13:22 PM |
| Population: | 60,283 [See All] |
| FIPS: | 39167 |
| CBSA: | Marietta, OH |
| Land Area: | 743 sq mi |
| Water Area: | 8 sq mi |
| Coordinates: | 39.4697, -81.5212 |
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60,283 residents live across 20 ZIPs covering 743 sq mi, served by 20 distinct USPS-recognized cities.
Population moved from 63,072 to 60,283 from 2014 to 2024 — a -4.4% change. 4 ZIPs gained residents, 13 lost.
The county's wealthiest ZIP 45788 (Whipple, $100,682 median) and poorest ZIP 45767 (New Matamoras, $42,813) are 12.7 miles apart — a 2.4× income gap across local geography.
Median home values vary 2.4× across this county — from $105,700 in 45745 (Lower Salem) to $249,100 in 45729 (Fleming).
Density varies 19× across the county — from 15 people/sq mi in 45745 (Lower Salem) to 276 in 45714 (Belpre).
Educational attainment ranges from 5.5% bachelor's+ in 45773 (Reno) to 28.0% in 45786 (Waterford) — the breadth of educational profiles across the area.
Within Ohio, this is the #42 most populous of 88 counties and ranks #55 for median household income .
Weighted by population, the typical household earns about $63,386 across the county — reflecting what a typical resident sees, not a simple ZIP average.
21.4% of adults age 25+ hold a bachelor's degree or higher (9,286 of 43,393 reporting).
17 Standard delivery, 3 PO Box only, 0 single-entity Unique ZIPs serve this county.
A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 45750 | Marietta | Standard | 26,420 | $60,229 | 108.3 | -4.7% |
| 45714 | Belpre | Standard | 9,503 | $56,574 | 34.4 | -0.2% |
| 45742 | Little Hocking | Standard | 3,752 | $78,194 | 26.6 | 26.3% |
| 45786 | Waterford | Standard | 3,187 | $70,917 | 62.9 | -13.0% |
| 45784 | Vincent | Standard | 3,002 | $82,713 | 38.2 | -17.0% |
| 45767 | New Matamoras | Standard | 2,428 | $42,813 | 111.5 | -0.2% |
| 45744 | Lowell | Standard | 2,179 | $69,148 | 55.3 | -9.6% |
| 45729 | Fleming | Standard | 2,121 | $82,110 | 27.5 | 54.4% |
| 45715 | Beverly | Standard | 2,006 | $47,176 | 43.9 | -19.0% |
| 45768 | Newport | Standard | 1,503 | $84,286 | 31.6 | -9.0% |
| 45724 | Cutler | Standard | 1,218 | $58,500 | 54.8 | -33.8% |
| 45745 | Lower Salem | Standard | 1,049 | $44,250 | 72.2 | -27.4% |
| 45788 | Whipple | Standard | 691 | $100,682 | 32.5 | -47.0% |
| 45773 | Reno | Standard | 600 | $69,848 | 12.1 | 358.0% |
| 45746 | Macksburg | Standard | 329 | $65,161 | 19.1 | -28.5% |
| 45789 | Wingett Run | Standard | 280 | $81,649 | 11.7 | 803.2% |
| 45721 | Coal Run | Standard | 15 | — | 0.0 | -64.3% |
| 45712 | Barlow | PO Box | — | — | 0.0 | — |
| 45713 | Bartlett | PO Box | — | — | 0.0 | — |
| 45787 | Watertown | PO Box | — | — | 0.0 | — |