County in Illinois
Adams County
About 64,800 people, median household income $66,200.
District lines run through Adams County, so who represents you here depends on where you live. Search your address to see yours.
Who lives in Adams County
Census survey estimates for 2020 to 2024, rounded.
People
- Population
- 64,800
- Median age
- 41.4 years
- Under 18
- 23%
- 65 and over
- 21%
- Veterans, of adults
- 8%
- Speak another language at home
- 2%
Race and ethnicity
- Hispanic or Latino, of any race
- 2%
- White, not Hispanic
- 90%
- Black, not Hispanic
- 3%
- Asian, not Hispanic
- 1%
Income and housing
- Median household income
- $66,200
- Below the poverty line
- 13%
- Bachelor's or higher, adults 25+
- 28%
- Owner-occupied homes
- 72%
- Median home value
- $163,000
2024 vote for president
- Donald Trump, Republican
- 72.9%
- Kamala Harris, Democrat
- 25.5%
- Other candidates
- 1.6%
Votes counted, by precinct. Source: MIT Election Data and Science Lab, precinct returns (public domain).
Represent all of Adams County
Adams County's districts
U.S. House District 15
All of Adams County
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
Part of Adams County: 2,408 people in 2020
Held by Neil Anderson, Republican
- Springfield office: (217) 782-5957
- District office: (309) 230-7584
Illinois Senate District 50
Part of Adams County: 63,329 people in 2020
Held by Jil Tracy, Republican
- Springfield office: (217) 782-2479
- District office: (217) 223-0833
About 214,400 people, median household income $71,300.
Largest towns: Quincy, Jacksonville, Godfrey (part) and 104 more
Illinois House District 94
Part of Adams County: 2,408 people in 2020
Held by Norine Hammond, Republican
- Springfield office: (217) 782-0416
- District office: (309) 836-2707
Illinois House District 99
Part of Adams County: 57,789 people in 2020
Held by Kyle Moore, Republican
- Springfield office: (217) 782-8096
- District office: (217) 223-0833
About 108,000 people, median household income $66,100.
Largest towns: Quincy, Jacksonville, Beardstown and 26 more
Illinois House District 100
Part of Adams County: 5,540 people in 2020
Held by C.D. Davidsmeyer, Republican
- Springfield office: (217) 782-1840
- District office: (217) 243-6221
About 106,400 people, median household income $77,500.
Largest towns: Godfrey (part), Jerseyville, Pittsfield and 76 more
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.
Towns (25)
Cities, villages and unincorporated communities, with the number of people in the county’s part of each at the 2020 Census.
- Quincy39,463
- Camp Point1,121
- Payson1,025
- Mendon872
- Golden648
- Clayton639
- Ursa609
- Liberty543
- Loraine300
- Plainville271
- Fowler154
- Coatsburg150
- Lima148
- Paloma114
- Columbus114
- Burton103
- Marcelline75
- Adams75
- Beverly72
- La Prairie42
- Bloomfield32
- Fall Creek31
- Richfield26
- Kingston20
1 more town
- Meyer18
Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2020–2024; towns and counties from the 2020 Census, Demographic and Housing Characteristics. 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.