| ZIP Codes: | 7 ZIP Codes (7 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Code: | 260 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:12:05 PM |
| Population: | 42,541 [See All] |
| FIPS: | 18033 |
| CBSA: | Auburn, IN |
| Land Area: | 324 sq mi |
| Water Area: | 1 sq mi |
| Coordinates: | 41.4064, -85.0278 |
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42,541 residents live across 7 ZIPs covering 324 sq mi, served by 7 distinct USPS-recognized cities.
Population moved from 41,174 to 42,541 from 2014 to 2024 — a +3.3% change. 4 ZIPs gained residents, 3 lost.
The county's wealthiest ZIP 46730 (Corunna, $116,181 median) and poorest ZIP 46738 (Garrett, $57,545) are 8.9 miles apart — a 2.0× income gap across local geography.
Median home values vary 2.3× across this county — from $138,800 in 46721 (Butler) to $316,500 in 46730 (Corunna).
Density varies 8× across the county — from 44 people/sq mi in 46730 (Corunna) to 343 in 46738 (Garrett).
Educational attainment ranges from 6.5% bachelor's+ in 46785 (Saint Joe) to 27.0% in 46706 (Auburn) — the breadth of educational profiles across the area.
Within Indiana, this is the #35 most populous of 92 counties and ranks #30 for median household income .
Weighted by population, the typical household earns about $74,609 across the county — reflecting what a typical resident sees, not a simple ZIP average.
21.3% of adults age 25+ hold a bachelor's degree or higher (6,174 of 28,952 reporting).
7 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 46706 | Auburn | Standard | 20,403 | $80,965 | 90.8 | 6.8% |
| 46738 | Garrett | Standard | 8,533 | $57,545 | 24.9 | 8.6% |
| 46721 | Butler | Standard | 4,739 | $68,580 | 78.3 | -7.2% |
| 46793 | Waterloo | Standard | 4,104 | $79,949 | 55.4 | -4.8% |
| 46705 | Ashley | Standard | 1,972 | $67,266 | 20.3 | 15.5% |
| 46785 | Saint Joe | Standard | 1,491 | $63,250 | 24.6 | -21.9% |
| 46730 | Corunna | Standard | 1,299 | $116,181 | 29.3 | 9.6% |