| ZIP Codes: | 7 ZIP Codes (4 Standard, 3 PO Box, 0 Unique) [See All] |
| Area Code: | 260 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 11:53:22 PM |
| Population: | 35,445 [See All] |
| FIPS: | 18001 |
| CBSA: | Decatur, IN |
| Land Area: | 326 sq mi |
| Water Area: | 1 sq mi |
| Coordinates: | 40.7246, -84.9498 |
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35,445 residents live across 7 ZIPs covering 326 sq mi, served by 7 distinct USPS-recognized cities.
Population moved from 34,342 to 35,445 from 2014 to 2024 — a +3.2% change. 2 ZIPs gained residents, 2 lost.
The county's wealthiest ZIP 46772 (Monroe, $80,000 median) and poorest ZIP 46740 (Geneva, $58,484) are 8.4 miles apart — a 1.4× income gap across local geography.
Median home values vary 1.5× across this county — from $158,900 in 46740 (Geneva) to $241,600 in 46772 (Monroe).
Density varies 2× across the county — from 71 people/sq mi in 46740 (Geneva) to 144 in 46711 (Berne).
Educational attainment ranges from 9.5% bachelor's+ in 46740 (Geneva) to 20.6% in 46711 (Berne) — the breadth of educational profiles across the area.
Within Indiana, this is the #48 most populous of 92 counties and ranks #61 for median household income .
Weighted by population, the typical household earns about $66,618 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 (3,425 of 21,311 reporting).
4 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 |
|---|---|---|---|---|---|---|
| 46733 | Decatur | Standard | 19,318 | $64,483 | 168.1 | 5.7% |
| 46711 | Berne | Standard | 8,353 | $70,656 | 58.2 | 9.5% |
| 46740 | Geneva | Standard | 4,486 | $58,484 | 62.7 | -10.9% |
| 46772 | Monroe | Standard | 3,288 | $80,000 | 37.1 | -3.6% |
| 46780 | Pleasant Mills | PO Box | — | — | 0.0 | — |
| 46769 | Linn Grove | PO Box | — | — | 0.0 | — |
| 46782 | Preble | PO Box | — | — | 0.0 | — |