Collinsville Population 2026
Collinsville has a population of 24,754, making it the #1909 biggest city in 🇺🇸 United States, located in Illinois. It is about 356× smaller than New York City, the country's biggest city.
Population (city proper)
24,754
Rank in United States
#1909
Coordinates
38.67°N, 89.98°W
~171 m elevation · America/Chicago
Distance to capital (Washington)
1,122 km
697 miles, straight line
Other big cities in Illinois
| City | Population | Rank in United States |
|---|---|---|
| Chicago | 2,664,452 | #3 |
| Aurora | 200,661 | #125 |
| Rockford | 148,278 | #184 |
| Joliet | 147,861 | #186 |
| Naperville | 147,100 | #190 |
| Peoria | 115,070 | #259 |
| Springfield | 114,394 | #262 |
| North Peoria | 113,004 | #266 |
Cities near Collinsville
- Fairview Heights16,827 people · ~9 km away
- O'Fallon29,002 people · ~11 km away
- Granite City29,054 people · ~15 km away
- East Saint Louis27,006 people · ~15 km away
- Edwardsville24,992 people · ~16 km away
- Belleville42,034 people · ~17 km away
FAQ
What is the population of Collinsville?
Collinsville has a population of 24,754 (city proper, latest official figure via GeoNames), making it the #1909 biggest city in United States.
What state is Collinsville in?
Collinsville is located in Illinois, United States.
Is Collinsville the capital of United States?
No, the capital of United States is Washington D.C., about 1,122 km away.
Sources & notes
Population refers to the city proper (municipal boundaries), not the metropolitan area. Source: GeoNames (CC BY 4.0), retrieved 2026-07-07. Country data: UN World Population Prospects 2024.
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