Decatur County GIS Maps
Decatur County, Indiana, has 26,472 residents across 18,067 parcels and covers 372.6 square miles. The population grew 2.8% between the 2010 and 2020 census. More residents moved in than left over that decade. The FIPS code for Decatur County is 18031.
Greensburg is the county's largest population center. Decatur County also includes 5 zip codes, 2 public school districts and 25 municipalities. Those boundaries help explain why population, schools, and housing can look different from one part of the county to another. The map below shows how those county lines, zip codes, and school districts fit together, and the sections that follow use that same geography to show parcel data, population, demographics, school enrollment and housing patterns in more detail.
Maps, GIS layers, Parcels and sample data. Paid packages add full layers, analytics and database files.
Decatur County Trends
- Population
- 26,472▴
- Median Home Value
- $189,900▴
- K-12 Enrollment
- 3,789▾
County analytics dashboards with historical trends & projections included in package downloads.
Free starter access previews county maps, lightweight GIS, and sample data. Paid packages unlock full GIS layers, analytics, and database files.
Decatur County Maps
The maps below show a few of the county map styles included in our downloads. County packages include map exports in JPEG, PNG, SVG, PDF and GeoTIFF formats plus more than 20 GIS layers for mapping, research and analysis. Available layers include zip codes, area codes, subdivisions, school districts, political boundaries, roads, water features, points of interest and more.
County packages also include historical county demographics, business intelligence, analytical dashboards, AI-ready prompts, markdown files and related reference data. Everything is organized to save hours of manual work collecting current data, cleaning it and joining it together. That makes it easier to move faster on analytics, due diligence, business planning and location research. Paid packages are built for commercial use, but some package contents include source-specific attribution or notice guidance. Review Licensing & Data Source Notices.
Decatur County Parcels
Decatur County has 18,067 mapped parcels covering 236,823 acres. The median assessed value is $154,500. The median lot size is 3.48 acres. 3,809 parcels are 10 acres or larger. The records carry 11,704 distinct owner names. Owner names and site addresses are on nearly every parcel. Assessed values reach 96.0%. Lot sizes reach 57.7%. Browse the interactive Decatur County Parcel viewer here.
Decatur County Parcel Data Coverage
| Field | Parcels | Coverage |
|---|---|---|
| Parcel ID | 18,067 | 100% |
| Owner name | 17,872 | 98.9% |
| Owner mailing address | 0 | 0% |
| Site address | 17,872 | 98.9% |
| Land use code | 0 | 0% |
| Land use description | 0 | 0% |
| Assessed value | 17,345 | 96.0% |
| Land value | 0 | 0% |
| Improvement value | 0 | 0% |
| Acreage | 10,425 | 57.7% |
| Parcel boundary | 18,067 | 100% |
| Download all Decatur County parcels. | ||
Field coverage measured across all Decatur County parcel records.
Decatur County Population
Decatur County had 26,472 residents in 2020. That was 2.8% higher than in 2010. Decatur County added 1,917 people between 2000 and 2020, which points to steady long-term growth. The county is fairly spread out, with about 71 people per square mile. Some of the county's most populated postal areas include Greensburg, Westport and Saint Paul.
Population Trend in Decatur County IN
Decatur County Population per 2000, 2010 and 2020 census counts with a baseline 2030 projection.
Decatur County Zip Codes
Decatur County has 5 zip codes. Some of the county's most populated zip codes include Greensburg (47240), Westport (47283) and Saint Paul (47272). Greensburg is the largest zip by population, with about 21,940 residents or 83% of the county total. Together, the three largest zips account for about 103% of all county residents based on 2020 population estimates.
Most Populated Zip Codes in Decatur County IN
| ZIP | Area | Population | Trend |
|---|---|---|---|
| 47240 | Greensburg | 21,940 | ▴ 5.3% |
| 47283 | Westport | 3,526 | ▴ 4.1% |
| 47272 | Saint Paul | 1,852 | ▾ -9.3% |
| 47263 | New Point | 174 | ▾ -26.3% |
| Download all zip code data | |||
Decatur County Zip Code populations and trends per most recent census data.
Decatur County Demographics
Decatur County has a median age of 40.4, which makes the county a little older than Indiana overall. About 23.7% of residents are under 18, while 17.7% are 65 or older. That gives the county a fairly even mix of younger families and older adults. The largest age group is 25 to 44 at about 30.5% of the population, which points to a solid working-age base. About 20.1% of adults have a bachelor's degree or higher, above the statewide figure of 28.8%. The county is mostly White by population, though Hispanic, Asian, Black and multiracial residents are also part of the local mix.
Key Demographics for Decatur County IN
Median Age
40.4
Under 18
23.7%
Age 65+
17.7%
Bachelor's+
20.1%
Decatur County School Districts
Decatur County is served by 2 public school districts with 3,789 students enrolled in 2024. Several larger districts account for a substantial share of students across the county map area. Those three districts account for about 100% of public school enrollment in the map area. Total enrollment has stayed fairly steady in recent years, but it is slightly lower than it was in 2017.
Largest School Districts by Enrollment in Decatur County IN
| District | Enrollment | Share | Trend |
|---|---|---|---|
| Greensburg Community Schools | 2,025 | 53.4% | ▾ -4.2% |
| Decatur County Community Schools | 1,764 | 46.6% | ▾ -4% |
| Download all school district data | |||
Decatur County school district enrollment and trends per most recent NCES reporting data.
Decatur County Housing & Real Estate
Decatur County has a median home value of $189,900 and a median gross rent of $828. About 75% of occupied homes in the county are owner-occupied, so the local housing market leans heavily toward ownership. Home values run below the Indiana median, while rents come in below the state average. In March 2026, the median listing price was $254,450 and homes spent about 88 days on the market.
Decatur County Housing Mix
Decatur County housing mix: owner, renter and vacant units.
Decatur County Housing Trends
Decatur County median home value and rent trend (last 5 years).
Businesses in Decatur County, IN
Decatur County has 1,247 business listings across 368 categories. The largest categories in Decatur County business listings are Churches & Religious Organizations (37, 3.0%), Landmark And Historical Building (25, 2.0%), and Gas Stations (23, 1.8%). The full Decatur County business listings dataset includes names, categories, addresses and contact details where available. Decatur County packages also include U.S. Census County Business Patterns data with establishment counts, employment and payroll by industry sector.
Top Business Categories in Decatur County, IN
| Category | Businesses | Share |
|---|---|---|
| Churches & Religious Organizations | 37 | 3.0% |
| Landmark And Historical Building | 25 | 2.0% |
| Gas Stations | 23 | 1.8% |
| Farm | 23 | 1.8% |
| Auto Repair | 17 | 1.4% |
| Medical Offices | 16 | 1.3% |
| Insurance Agencies | 16 | 1.3% |
| Contractors | 16 | 1.3% |
| Fast Food | 15 | 1.2% |
| Public And Government Association | 15 | 1.2% |
Decatur County Business Listings
| Business | Category | City |
|---|---|---|
| Groups Recover Together | Abuse And Addiction Treatment | Greensburg |
| SOLUTIONS Bookkeeping & Payroll | Accountant | Greensburg |
| Decatur County Conservation Club | Active Life | Greensburg |
| D C Integrated Medicine | Acupuncture | Greensburg |
| Sign Masters | Advertising Agency | St Paul |
| Lowe's Pellets & Grain, Inc. | Agricultural Cooperatives | Greensburg |
| Xperience Ag | Agricultural Service | Greensburg |
| Saint Maurice Feed and Supply | Agriculture | Greensburg |
| Greensburg Municipal Airport | Airport | Greensburg |
| Stone's Family Restaurant | American Restaurants | Greensburg |
| Download Decatur County business listings | ||
Decatur County business listings sourced from Overture Maps. Includes locations with a high level of confidence.
Decatur County Basemaps
Decatur County map and data packages include a set of useful basemaps to help you get started quickly. These include a custom light grey canvas, USGS topo, imagery and other reference layers that make it easier to build clear, meaningful county maps using the included GIS layers, your own data or both. Pre-rendered map tiles for the light grey basemap are included so you can use them offline or host them on your own CDN.
Get the Full Decatur County Data Package
This page shows a preview of what's included in the Decatur County data package. The full package gives you a ready-to-use county data system with GIS layers, historical data, maps, database files and planning tools that save hours of manual data gathering, cleanup and joins. Everything is organized to help you skip data wrangling and start analysis faster.
- 20+ GIS layers for parcels, zip codes, school districts, roads, water, boundaries and more
- Historical county demographics, housing, income and trend data
- ZIP code population files and school district enrollment history
- Database files, markdowns, AI-ready prompts and documentation
- Map exports in PNG, JPEG, PDF, SVG and GeoTIFF formats
- Offline-ready data explorer, map and analytics tools
Paid packages support commercial use, client work, and derived outputs. Some package contents may include source-specific attribution or provider notices. See Licensing & Data Source Notices.
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Nearby Counties
Browse county data pages for the counties that border Decatur County. These nearby pages include the same mix of county maps, demographic summaries, school district context, housing trends and package links.