Voter file loaded June 5, 2026 · figures are from that file, held as a fixed record
Madison County, Ohio has 23,704 active registered voters across 24 precincts, as of June 2026.
Party registration
Ohio doesn't register voters by party, so there's no party breakdown to show. Party lean is usually inferred from primary participation; that data is in the voter file and available inside Motion51.
Most reliable-voting precincts
| # | Precinct | Active voters | Supervoters | Supervoter % |
|---|---|---|---|---|
| 1 | JEFFERSON TWP B | 847 | 637 | 75.21% |
| 2 | CHOCTAW LAKE WEST | 847 | 633 | 74.73% |
| 3 | SOMERFORD | 682 | 492 | 72.14% |
| 4 | CHOCTAW LAKE EAST | 671 | 480 | 71.54% |
| 5 | FAIRFIELD | 939 | 646 | 68.8% |
| 6 | LONDON 2 | 1,333 | 917 | 68.79% |
| 7 | DARBY | 487 | 327 | 67.15% |
| 8 | DEERCREEK | 514 | 341 | 66.34% |
| 9 | PLEASANT | 805 | 527 | 65.47% |
| 10 | CANAAN | 1,469 | 958 | 65.21% |
Supervoters are active registered voters who cast a ballot in at least 3 of the last 4 November general elections (2018–2024). Percentages are precinct totals from the official state voter file — no individual voter information is shown. Precincts with fewer than 400 active voters are excluded.
How Madison County voted for president
Election results are public records.
Madison County at a glance.
Madison County had an estimated 45,531 residents in July 2024, the 53rd most populous of Ohio's 88 counties, up 3.8% since the 2020 census. Of those, 36,670 are 18 or older, the voting-age population, and 17.4% are 65 or older. Its 23,704 active registered voters equal about 64.6% of that voting-age population.
It covers 467 square miles of land (98 people per square mile). The largest cities and towns are London (10,743), West Jefferson (4,943), Plain City (part) (3,620), Mount Sterling (2,070) and South Solon (330). The American Community Survey (2020-2024) puts it at a median age of 41.5, a median household income of $87,045, 24.2% of adults 25 and older holding a bachelor's degree or higher and 77.5% of occupied homes owned by the people living in them.
In 2024, 20,668 votes were cast for president, about 56.4% of the voting-age population; the Democratic ticket took 27.6% and the Republican ticket 71.3%. The two-party margin moved from R+23.4 in 2008 to R+43.7 in 2024.
- Population (2024 estimate)
- 45,531
- Population (2020 census base)
- 43,848
- Voting-age population (18+)
- 36,670
- Active voters per 100 adults
- 64.6
- Residents 65 and older
- 17.4%
- People per square mile
- 98
- Land area
- 467 sq mi
- Median age
- 41.5
- Median household income
- $87,045
- Adults 25+ with a bachelor's degree
- 24.2%
- Owner-occupied homes
- 77.5%
Largest cities and towns
- London 10,743
- West Jefferson 4,943
- Plain City (part) 3,620
- Mount Sterling 2,070
- South Solon 330
Presidential vote, 2008–2024
| Year | Democratic | Republican | Margin | Votes cast |
|---|---|---|---|---|
| 2024 | 27.6% | 71.3% | R+43.7 | 20,668 |
| 2020 | 28.7% | 69.7% | R+41.0 | 19,855 |
| 2016 | 27.8% | 67.6% | R+39.8 | 16,754 |
| 2012 | 38.9% | 59.3% | R+20.4 | 17,240 |
| 2008 | 37.4% | 60.8% | R+23.4 | 17,454 |
Sources: U.S. Census Bureau Vintage 2024 population estimates and 2024 Gazetteer; American Community Survey 2020–2024 5-year estimates; certified county presidential returns. Growth, density and turnout are simple arithmetic on those figures.
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