| ZIP Codes: | 10 ZIP Codes (7 Standard, 3 PO Box, 0 Unique) [See All] |
| Area Codes: | 220 / 326 / 740 / 937 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 11:54:37 PM |
| Population: | 46,780 [See All] |
| FIPS: | 39027 |
| CBSA: | Wilmington, OH |
| Land Area: | 498 sq mi |
| Water Area: | 4 sq mi |
| Coordinates: | 39.3983, -83.8176 |
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46,780 residents live across 10 ZIPs covering 498 sq mi, served by 10 distinct USPS-recognized cities.
Population moved from 46,329 to 46,780 from 2014 to 2024 — a +1.0% change. 5 ZIPs gained residents, 4 lost.
The county's wealthiest ZIP 45113 (Clarksville, $104,750 median) and poorest ZIP 45169 (Sabina, $52,405) are 19.5 miles apart — a 2.0× income gap across local geography.
Median home values vary 1.8× across this county — from $151,500 in 45169 (Sabina) to $280,200 in 45113 (Clarksville).
Density varies 3× across the county — from 42 people/sq mi in 45169 (Sabina) to 136 in 45177 (Wilmington).
Educational attainment ranges from 11.9% bachelor's+ in 45107 (Blanchester) to 24.6% in 45177 (Wilmington) — the breadth of educational profiles across the area.
Within Ohio, this is the #53 most populous of 88 counties and ranks #38 for median household income .
Weighted by population, the typical household earns about $74,880 across the county — reflecting what a typical resident sees, not a simple ZIP average.
19.6% of adults age 25+ hold a bachelor's degree or higher (6,235 of 31,783 reporting).
7 Standard delivery, 3 PO Box only, 0 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 45177 | Wilmington | Standard | 22,924 | $74,051 | 168.6 | 4.4% |
| 45107 | Blanchester | Standard | 9,190 | $71,510 | 81.8 | 1.7% |
| 45169 | Sabina | Standard | 4,050 | $52,405 | 96.5 | -18.3% |
| 45113 | Clarksville | Standard | 3,877 | $104,750 | 38.8 | 10.5% |
| 45159 | New Vienna | Standard | 3,588 | $82,961 | 57.6 | 6.0% |
| 45148 | Midland | Standard | 1,592 | $78,438 | 26.6 | 4.5% |
| 45146 | Martinsville | Standard | 1,324 | $71,184 | 28.2 | -12.4% |
| 45164 | Port William | PO Box | 175 | $48,750 | 0.1 | -39.7% |
| 45166 | Reesville | PO Box | 60 | — | 0.0 | -64.7% |
| 45114 | Cuba | PO Box | — | — | 0.0 | — |