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Dorchester, IL

Population
125
U.S. Census Population Estimates Program · 2025
Elevation
654 ft
Median Home Value
$153,800
U.S. Census American Community Survey 5-Year · 2024
Median Income
$127,500
U.S. Census American Community Survey 5-Year · 2024

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Dorchester in context.

OverallBest places in IllinoisPopulation rankingHighest population places in IllinoisNearest larger communityWood River, Illinois18 miles away · 10,224 residents.

About Dorchester

Dorchester is a village in Macoupin County, Illinois, United States. The 2020 census counted 133 residents. The village drains eastward to the West Fork of Cahokia Creek, which leads south, then west, to the Mississippi River near St. Louis. That mix gives Dorchester a clear local shape within Illinois, with older layers still visible in current places. The local scoop is a place whose streets, landmarks, and institutions keep its earlier story close to the present.

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Highest current ratings for this town.

Lower County Wildfire Hazard Potential ClassA+100.0ratingLower Projected Late-Century County-Area Exposure to Sea-Level RiseA+100.0ratingLow PopulationA+100.0rating

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