Decatur, IN Micro Area
The Decatur, IN micro area is one county in Indiana: Adams County. About 36,650 people lived there on July 1, 2025 (Census estimate), 2.4% more than in April 2020.
- Population, July 2025
- 36,650 2.4% more than in April 2020
- Type
- Micropolitan statistical area
- County
- Adams County
- Land area
- 339 sq mi (878 km²)
- Time zone
- Eastern TimeUTC-05:00 in January; UTC-04:00 in July
- State
- Indiana
- Combined statistical area
- Fort Wayne-Huntington-Auburn, IN
- CBSA code
- 19540
The county in the Decatur, IN micro area
| County | Role | Population, July 2025 |
|---|---|---|
| Adams County | Central | 36,650 |
A central county holds the area’s core, an urban area of 10,000 to 49,999 people. This area has no outlying counties: no neighboring county sends enough commuters to join it. A county belongs to one metro or micro area at most, and it counts whole, countryside included.
Principal city
- Decatur9,811 people
OMB names the area after its largest principal cities. A principal city is the area’s largest city, plus any other city that is very large or a big job center, and smaller ones with at least as many jobs as working residents (2020 Census and commuting figures). People counts are American Community Survey 2020–2024 5-year estimates.
Part of the Fort Wayne-Huntington-Auburn, IN combined statistical area
OMB joins neighboring metro and micro areas into a combined statistical area when enough people commute between them. The other 5 areas in this one, largest first:
- Fort Wayne, IN Metro Area466,258 people
- Kendallville, IN Micro Area47,937 people
- Auburn, IN Micro Area44,535 people
- Huntington, IN Micro Area37,224 people
- Angola, IN Micro Area34,799 people
Bordering metro and micro areas, nearest first
Areas with a county on this area’s edge. Distances are straight lines between the areas’ largest cities.
- Van Wert, OH Micro Area18 mi east
- Fort Wayne, IN Metro Area21 mi northwest
- Celina, OH Micro Area27 mi southeast
Before using this answer on a form
A metro or micro area is a statistical area that OMB draws for federal statistics. It is not a city, a local government or a mailing address, and it is not a measure of urban and rural: whole counties count, rural parts included. Programs that use metro areas, such as housing income limits or wage rates, can use their own version of these lists; check the program’s own list for an address.
Find the metro area where you are now, find your county, or see every metro and micro area by population.