Data as of November 4, 2026 · refreshed automatically from the official Indiana voter file
Jackson County, Indiana has 28,098 active registered voters across 30 precincts, as of November 2026.
Party registration
Indiana 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.
How Jackson County voted for president
Election results are public records.
Jackson County at a glance.
Jackson County had an estimated 47,420 residents in July 2024, the 31st most populous of Indiana's 92 counties, up 2.1% since the 2020 census. Of those, 35,194 are 18 or older, the voting-age population, and 17.1% are 65 or older. Its 28,098 active registered voters equal about 79.8% of that voting-age population.
It covers 510 square miles of land (93 people per square mile). The largest cities and towns are Seymour (22,524), Brownstown (3,077), Crothersville (1,517) and Medora (647). The American Community Survey (2020-2024) puts it at a median age of 38.4, a median household income of $70,262, 20.3% of adults 25 and older holding a bachelor's degree or higher and 73.2% of occupied homes owned by the people living in them.
In 2024, 18,653 votes were cast for president, about 53.0% of the voting-age population; the Democratic ticket took 21.5% and the Republican ticket 76.8%. The two-party margin moved from R+13.7 in 2008 to R+55.3 in 2024.
- Population (2024 estimate)
- 47,420
- Population (2020 census base)
- 46,434
- Voting-age population (18+)
- 35,194
- Active voters per 100 adults
- 79.8
- Residents 65 and older
- 17.1%
- People per square mile
- 93
- Land area
- 510 sq mi
- Median age
- 38.4
- Median household income
- $70,262
- Adults 25+ with a bachelor's degree
- 20.3%
- Owner-occupied homes
- 73.2%
Largest cities and towns
- Seymour 22,524
- Brownstown 3,077
- Crothersville 1,517
- Medora 647
Presidential vote, 2008–2024
| Year | Democratic | Republican | Margin | Votes cast |
|---|---|---|---|---|
| 2024 | 21.5% | 76.8% | R+55.3 | 18,653 |
| 2020 | 22.4% | 75.7% | R+53.3 | 19,238 |
| 2016 | 21.9% | 73.3% | R+51.4 | 17,532 |
| 2012 | 34.9% | 62.4% | R+27.5 | 16,704 |
| 2008 | 42.3% | 56.0% | R+13.7 | 17,374 |
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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