Decatur, IL Metro Area
The Decatur, IL metro area is one county in Illinois: Macon County. About 99,300 people lived there on July 1, 2025 (Census estimate), 4.5% fewer than in April 2020.
- Population, July 2025
- 99,300 4.5% fewer than in April 2020
- Type
- Metropolitan statistical area
- County
- Macon County
- Land area
- 581 sq mi (1,504 km²)
- Time zone
- Central TimeUTC-06:00 in January; UTC-05:00 in July
- State
- Illinois
- CBSA code
- 19500
The county in the Decatur, IL metro area
| County | Role | Population, July 2025 |
|---|---|---|
| Macon County | Central | 99,300 |
A central county holds the area’s core, an urban area of at least 50,000 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
- Decatur69,815 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.
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.
- Taylorville, IL Micro Area28 mi southwest
- Lincoln, IL Micro Area31 mi northwest
- Springfield, IL Metro Area38 mi west
- Champaign-Urbana, IL Metro Area39 mi northeast
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.
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