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Plainville, IL

Population
260
U.S. Census Population Estimates Program · 2025
Elevation
692 ft
Median Home Value
$98,000
U.S. Census American Community Survey 5-Year · 2024
Median Income
$76,250
U.S. Census American Community Survey 5-Year · 2024

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Plainville in context.

OverallBest places in IllinoisPopulation rankingHighest population places in IllinoisNearest larger communityHannibal, Missouri12 miles away · 16,804 residents.

About Plainville

Plainville is a village in Adams County, Illinois, United States. The 2020 census counted 271 residents. Plainville is part of the Quincy, IL–MO Micropolitan Statistical Area. Plainville was originally called Stone's Prairie after Samuel Stone who settled here in 1822. The comprehensive high school of that district is Payson-Seymour High School. Plainville's local map joins its older history to the places and landscapes that still shape the town today, all within the wider Illinois setting. The local scoop is how Plainville's history still shows up in the places people visit, work, learn, and meet.

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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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