Alton Population 2026
Alton has a population of 27,003, making it the #1737 biggest city in 🇺🇸 United States, located in Illinois. It is about 326× smaller than New York City, the country's biggest city.
Population (city proper)
27,003
Rank in United States
#1737
Coordinates
38.89°N, 90.18°W
~150 m elevation · America/Chicago
Distance to capital (Washington)
1,137 km
706 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 Alton
- Upper Alton29,251 people · ~4 km away
- Florissant52,268 people · ~16 km away
- Granite City29,054 people · ~21 km away
- Edwardsville24,992 people · ~22 km away
- University City35,058 people · ~28 km away
- Saint Charles65,794 people · ~28 km away
FAQ
What is the population of Alton?
Alton has a population of 27,003 (city proper, latest official figure via GeoNames), making it the #1737 biggest city in United States.
What state is Alton in?
Alton is located in Illinois, United States.
Is Alton the capital of United States?
No, the capital of United States is Washington D.C., about 1,137 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.
← All biggest cities in United States · United States population by year