| ZIP Codes: | 10 ZIP Codes (7 Standard, 3 PO Box, 0 Unique) [See All] |
| Area Codes: | 419 / 567 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:13:21 PM |
| Population: | 42,549 [See All] |
| FIPS: | 39107 |
| CBSA: | Celina, OH |
| Land Area: | 478 sq mi |
| Water Area: | 11 sq mi |
| Coordinates: | 40.4868, -84.6103 |
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42,549 residents live across 10 ZIPs covering 478 sq mi, served by 10 distinct USPS-recognized cities.
Population moved from 40,826 to 42,549 from 2014 to 2024 — a +4.2% change. 9 ZIPs gained residents, 1 lost.
The county's wealthiest ZIP 45883 (Saint Henry, $113,967 median) and poorest ZIP 45862 (Mendon, $45,556) are 20.1 miles apart — a 2.5× income gap across local geography.
Median home values vary 2.7× across this county — from $108,200 in 45862 (Mendon) to $297,000 in 45883 (Saint Henry).
Density varies 48× across the county — from 34 people/sq mi in 45882 (Rockford) to 1,640 in 45826 (Chickasaw).
Educational attainment ranges from 9.9% bachelor's+ in 45862 (Mendon) to 30.9% in 45883 (Saint Henry) — the breadth of educational profiles across the area.
Within Ohio, this is the #58 most populous of 88 counties and ranks #14 for median household income .
Weighted by population, the typical household earns about $79,276 across the county — reflecting what a typical resident sees, not a simple ZIP average.
22.0% of adults age 25+ hold a bachelor's degree or higher (6,224 of 28,275 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 |
|---|---|---|---|---|---|---|
| 45822 | Celina | Standard | 19,957 | $70,200 | 175.1 | 2.7% |
| 45828 | Coldwater | Standard | 6,404 | $72,703 | 34.1 | 5.4% |
| 45846 | Fort Recovery | Standard | 4,644 | $91,736 | 74.0 | 10.3% |
| 45883 | Saint Henry | Standard | 4,144 | $113,967 | 38.7 | 2.7% |
| 45882 | Rockford | Standard | 2,919 | $74,625 | 85.3 | 2.7% |
| 45860 | Maria Stein | Standard | 2,326 | $111,269 | 33.6 | 8.9% |
| 45862 | Mendon | Standard | 1,417 | $45,556 | 36.6 | 6.8% |
| 45826 | Chickasaw | PO Box | 394 | $101,250 | 0.2 | 13.5% |
| 45310 | Burkettsville | PO Box | 227 | $77,917 | 0.2 | 5.1% |
| 45866 | Montezuma | PO Box | 117 | $80,833 | 0.1 | -42.9% |