| ZIP Codes: | 4 ZIP Codes (3 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Codes: | 220 / 740 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:13:20 PM |
| Population: | 31,401 [See All] |
| FIPS: | 39079 |
| Land Area: | 398 sq mi |
| Water Area: | 1 sq mi |
| Coordinates: | 39.0278, -82.5745 |
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31,401 residents live across 4 ZIPs covering 398 sq mi, served by 4 distinct USPS-recognized cities.
Population moved from 32,017 to 31,401 from 2014 to 2024 — a -1.9% change. 2 ZIPs gained residents, 2 lost.
The county's wealthiest ZIP 45640 (Jackson, $59,566 median) and poorest ZIP 45621 (Coalton, $46,932) are 6.1 miles apart — a 1.3× income gap across local geography.
Median home values vary 3.1× across this county — from $55,200 in 45621 (Coalton) to $168,800 in 45640 (Jackson).
Density varies 21× across the county — from 53 people/sq mi in 45656 (Oak Hill) to 1,113 in 45621 (Coalton).
Educational attainment ranges from 3.0% bachelor's+ in 45621 (Coalton) to 18.8% in 45640 (Jackson) — the breadth of educational profiles across the area.
Within Ohio, this is the #72 most populous of 88 counties and ranks #82 for median household income .
Weighted by population, the typical household earns about $58,237 across the county — reflecting what a typical resident sees, not a simple ZIP average.
16.1% of adults age 25+ hold a bachelor's degree or higher (3,469 of 21,532 reporting).
3 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.