| ZIP Codes: | 10 ZIP Codes (7 Standard, 3 PO Box, 0 Unique) [See All] |
| Area Codes: | 220 / 419 / 567 / 740 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:13:21 PM |
| Population: | 65,284 [See All] |
| FIPS: | 39101 |
| CBSA: | Marion, OH |
| Land Area: | 433 sq mi |
| Water Area: | 0 sq mi |
| Coordinates: | 40.5818, -83.1622 |
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65,284 residents live across 10 ZIPs covering 433 sq mi, served by 9 distinct USPS-recognized cities.
Population moved from 66,431 to 65,284 from 2014 to 2024 — a -1.7% change. 4 ZIPs gained residents, 4 lost.
The county's wealthiest ZIP 43356 (Waldo, $92,870 median) and poorest ZIP 43314 (Caledonia, $49,183) are 14.2 miles apart — a 1.9× income gap across local geography.
Median home values vary 2.0× across this county — from $123,300 in 43322 (Green Camp) to $250,500 in 43356 (Waldo).
Density varies 85× across the county — from 17 people/sq mi in 43337 (Morral) to 1,464 in 43322 (Green Camp).
Educational attainment ranges from 10.4% bachelor's+ in 43314 (Caledonia) to 32.7% in 43356 (Waldo) — the breadth of educational profiles across the area.
Within Ohio, this is the #39 most populous of 88 counties and ranks #57 for median household income .
Weighted by population, the typical household earns about $58,266 across the county — reflecting what a typical resident sees, not a simple ZIP average.
14.8% of adults age 25+ hold a bachelor's degree or higher (6,828 of 46,046 reporting).
7 Standard delivery, 3 PO Box only, 0 single-entity Unique ZIPs serve this county.
One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 43302 | Marion | Standard | 53,702 | $55,057 | 197.0 | -1.3% |
| 43342 | Prospect | Standard | 3,836 | $84,803 | 43.9 | 18.4% |
| 43314 | Caledonia | Standard | 2,438 | $49,183 | 52.8 | -24.5% |
| 43332 | La Rue | Standard | 2,173 | $81,382 | 59.2 | 27.4% |
| 43356 | Waldo | Standard | 1,120 | $92,870 | 22.0 | 14.8% |
| 43341 | New Bloomington | Standard | 953 | $54,836 | 21.2 | -29.2% |
| 43337 | Morral | Standard | 625 | $70,833 | 36.3 | -48.2% |
| 43322 | Green Camp | PO Box | 437 | $56,250 | 0.3 | 34.0% |
| 43301 | Marion | PO Box | — | — | 0.0 | — |
| 43335 | Martel | PO Box | — | — | 0.0 | — |