Decatur, IN micro area ZIP codes
The Decatur, IN micropolitan statistical area (CBSA 19540) covers 1 county in Indiana and 7 ZIP codes.
- ZIP codes
- 7
- Population
- 35,445
- Avg. median income
- $66,600population-weighted
- Counties
- 1
Click anywhere on the map to see which ZIP code it's in.
Counties in the Decatur, IN area
ZIP codes in the Decatur, IN area
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 46711 | Berne | Adams County | 8,353 | $70,656 | $256,000 |
| 46733 | Decatur | Adams County | 19,318 | $64,483 | $236,200 |
| 46740 | Geneva | Adams County | 4,486 | $58,484 | $270,400 |
| 46769 PO Box | Linn Grove | Adams County | — | — | — |
| 46772 | Monroe | Adams County | 3,288 | $80,000 | $347,700 |
| 46780 PO Box | Pleasant Mills | Adams County | — | — | — |
| 46782 PO Box | Preble | Adams County | — | — | — |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Frequently asked questions
How many ZIP codes are in the Decatur, IN micro area?
7 ZIP codes, based on each ZIP code's main county.
Which counties make up the Decatur, IN area?
Adams County.
What is an MSA?
A metropolitan statistical area (MSA) is a core city of 50,000+ people plus the surrounding counties tied to it by commuting, as defined by the U.S. Office of Management and Budget. Micropolitan areas have a core of 10,000–50,000. Together they are called core-based statistical areas (CBSAs).