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Alton, IL

View of Alton, IL
Image credit: Illinois2011 / CC BY 3.0
Population
25,013
U.S. Census Population Estimates Program · 2025
Elevation
494 ft
Median Home Value
$103,700
U.S. Census American Community Survey 5-Year · 2024
Median Rent
$1,015/mo
U.S. Census American Community Survey 5-Year · 2024
Median Income
$54,568
U.S. Census American Community Survey 5-Year · 2024

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Alton in context.

OverallBest places in IllinoisPopulation rankingHighest population places in IllinoisNearest larger communityFlorissant, Missouri12 miles away · 51,124 residents.

About Alton

Alton is a historic city on the Mississippi River in Madison County, Illinois, located eighteen miles north of St. Louis. Famous for its towering limestone bluffs and as the site of the final 1858 Lincoln-Douglas debate, the community of approximately 25,300 played a key role in the Civil War. Today, the city hosts the Jacoby Arts Center and public education is administered by Alton Community Unit School District 11.

Top Rating Signals

Highest current ratings for this town.

Lower County Wildfire Hazard Potential ClassA+100.0ratingLower Projected Late-Century County-Area Exposure to Sea-Level RiseA+100.0ratingNearby Inpatient HospitalsA+99.5rating

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