Humidity & wind
—
Population
67,884
US Census estimate, July 2025
Median home value
$99,600
Owner-occupied units
Decatur, IL
Illinois · 39.856° N, 88.934° W · 44 sq mi
Decatur is a city in Illinois, with a population of 67,884 and about 1,537 residents per square mile. The median household earns $51,592 a year, and the median home is worth $99,600.
Conditions
UV index
—
Sunrise & sunset
—
Local time
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Size & density
Land area
44 sq mi
Water excluded
Population density
1,537
People per square mile
Rank by population
#615
Of cities on this site
Rank by area
#283
Of cities on this site
Money & housing
Median household income
$51,592
US median ≈ $78,538
Median gross rent
$845
Per month
Homeownership
62.9%
US ≈ 65%
Average commute
17.7 min
One way
People
Median age
39.2
US median 39.1
Bachelor's degree +
21.6%
Age 25 and over
Foreign born
3.1%
Households
30,920
2.17 people each
What people here do for work
Education & health care 23.9%
Manufacturing 17.8%
Retail trade 10.8%
Arts, food & hospitality 9.8%
Top four industries · share of all workers · ACS 2024
Wealthiest person in Illinois
Name
Lukas Walton
Forbes, Apr 2025
Net worth
$39B
As of 25 Apr 2025 — not live
Lives in
Chicago
Source of wealth
Walmart
Compiled from public reporting, not from an official dataset, and not independently verified.
Largest employer in Illinois · private sector
Employer
Advocate Health Care
Sector
Healthcare
Compiled from public reporting, not from an official dataset, and not independently verified. Government employers are excluded.
Largest public company in Illinois
Company
Archer Daniels Midland
Revenue
$85.5B
Fiscal year 2024
Headquarters
Chicago
Ticker
ADM
Compiled from public reporting, not from an official dataset, and not independently verified.
State of Illinois
State bird
Northern Cardinal
State flower
Violet
State capital
Springfield
Nickname
The Prairie State
Compare Decatur with
- Decatur vs SpringfieldSide by side
- Decatur vs ChampaignSide by side
- Decatur vs RowlettSide by side
- Decatur vs MadisonSide by side
- Decatur vs ChicagoSide by side
- Decatur vs AuroraSide by side
Cities near Decatur
- Springfield, IL38 mi · 112,989
- Champaign, IL39 mi · 91,195
- Bloomington, IL43 mi · 78,804
- Normal, IL46 mi · 53,275
- Peoria, IL72 mi · 110,920
- Terre Haute, IN87 mi · 58,764
- Florissant, MO104 mi · 51,124
- St. Louis, MO110 mi · 278,144
Cities about the same size
- Rowlett, TX67,890
- Madison, AL67,968
- South Hill, WA68,025
- Palo Alto, CA67,609
- Rockville, MD67,563
- Ames, IA68,220
- Sanford, FL67,483
- Oshkosh, WI67,460