City in McDonough County, Illinois
Colchester
Who lives in Colchester
Census survey estimates for 2020 to 2024, rounded.
People
- Population
- 1,100
- Median age
- 41.6 years
- Under 18
- 22%
- 65 and over
- 21%
- Veterans, of adults
- 9%
- Speak another language at home
- 0%
Race and ethnicity
- Hispanic or Latino, of any race
- 3%
- White, not Hispanic
- 95%
- Black, not Hispanic
- 0%
- Asian, not Hispanic
- 0%
Income and housing
- Median household income
- $64,000
- Below the poverty line
- 8%
- Bachelor's or higher, adults 25+
- 14%
- Owner-occupied homes
- 74%
- Median home value
- $92,000
2024 vote for president
Not counted for Colchester on its own: its precincts follow township lines, not the town’s. See the figure for McDonough County.
Who represents Colchester
Colchester's districts
U.S. House District 15
All of Colchester
Held by Mary E. Miller, Republican
- Washington office: (202) 225-5271
About 746,700 people, median household income $74,000.
Largest towns: Quincy, Decatur (part), Springfield (part) and 351 more
Illinois Senate District 47
All of Colchester
Held by Neil Anderson, Republican
- Springfield office: (217) 782-5957
- District office: (309) 230-7584
Illinois House District 94
All of Colchester
Held by Norine Hammond, Republican
- Springfield office: (217) 782-0416
- District office: (309) 836-2707
Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2020–2024; towns and counties from the 2020 Census, 119th Congressional District and 2024 state legislative district tabulation. Figures rounded by us. Retrieved 2026-10-19. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2020–2024; towns and counties from the 2020 Census, 119th Congressional District and 2024 state legislative district tabulation. Figures rounded by us. Retrieved 2026-10-19. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.