ZIP Codes of Decatur County, IN

Population & People
Population & People
Total Population
27,832
Household Income
Household Income
Median Income
$71,970
Housing
Housing
Total Housing Units
12,263
Business & Economy
Business & Economy
Total Businesses
655
Employment
Employment
Employment Rate
63.79%
Education
Education
Bachelor's Degree+
20.26%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 5 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:5 ZIP Codes (3 Standard, 2 PO Box, 0 Unique) [See All]
Area Codes:812 / 930
Timezone:Eastern (GMT -05:00)
Local Time:2:12:05 PM
Population:27,832 [See All]
FIPS:18031
CBSA:Greensburg, IN
Land Area:407 sq mi
Water Area:1 sq mi
Coordinates:39.3294, -85.4776
Quick Link:
https://www.zip-codes.com/county/in-decatur.asp
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Indiana's #58 most populous county
27,832 residents across 5 ZIPs — #58 of 92 Indiana counties.

Standout ZIPs in this County


Most Populous
Greensburg · 21,484 people
77.2% of county total
Highest Income
Saint Paul · $75,117 median
1.0× county average
Largest Land Area
Greensburg · 307.3 sq mi
Spans the most ground
Fastest Growth
Westport · 42.9% (10-yr)
3,013 → 4,305 residents
Most Educated
Saint Paul · 24.0% bachelor's+
287 of 1,197 adults 25+

Things worth knowing about Decatur County


27,832 residents live across 5 ZIPs covering 407 sq mi, served by 5 distinct USPS-recognized cities.

Population moved from 26,466 to 27,756 from 2014 to 2024 — a +4.9% change. 2 ZIPs gained residents, 2 lost.

The county's wealthiest ZIP 47272 (Saint Paul, $75,117 median) and poorest ZIP 47240 (Greensburg, $69,985) are 10.1 miles apart — a 1.1× income gap across local geography.

Median home values vary 1.5× across this county — from $135,900 in 47272 (Saint Paul) to $209,200 in 47240 (Greensburg).

Density varies across the county — from 60 people/sq mi in 47272 (Saint Paul) to 70 in 47240 (Greensburg).

Educational attainment ranges from 19.6% bachelor's+ in 47240 (Greensburg) to 24.0% in 47272 (Saint Paul) — the breadth of educational profiles across the area.

Within Indiana, this is the #58 most populous of 92 counties and ranks #47 for median household income with the #17 fastest decade growth .

Weighted by population, the typical household earns about $70,948 across the county — reflecting what a typical resident sees, not a simple ZIP average.

20.3% of adults age 25+ hold a bachelor's degree or higher (3,856 of 19,036 reporting).

3 Standard delivery, 2 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Decatur County


Single-ZIP anchor

One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.

Greensburg

All ZIP Codes in Decatur County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
47240GreensburgStandard21,484$69,985307.32.0%
47283WestportStandard4,305$74,02869.142.9%
47272Saint PaulStandard1,844$75,11730.8-14.4%
47263New PointPO Box123$68,7500.0-49.4%
47225ClarksburgPO Box760.0

Adjacent & Nearby Counties