Data as of November 4, 2026 · refreshed automatically from the official Indiana voter file
Grant County, Indiana has 42,734 active registered voters across 63 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 Grant County voted for president
Election results are public records.
Grant County at a glance.
Grant County had an estimated 66,458 residents in July 2024, the 25th most populous of Indiana's 92 counties, down 0.3% since the 2020 census. Of those, 52,262 are 18 or older, the voting-age population, and 19.9% are 65 or older. Its 42,734 active registered voters equal about 81.8% of that voting-age population.
It covers 414 square miles of land (160 people per square mile). The largest cities and towns are Marion (28,216), Gas City (6,091), Upland (3,819), Fairmount (2,666) and Jonesboro (1,506). The American Community Survey (2020-2024) puts it at a median age of 38.7, a median household income of $53,522, 20.3% of adults 25 and older holding a bachelor's degree or higher and 72.7% of occupied homes owned by the people living in them.
In 2024, 25,133 votes were cast for president, about 48.1% of the voting-age population; the Democratic ticket took 28.2% and the Republican ticket 69.9%. The two-party margin moved from R+13.1 in 2008 to R+41.7 in 2024.
- Population (2024 estimate)
- 66,458
- Population (2020 census base)
- 66,678
- Voting-age population (18+)
- 52,262
- Active voters per 100 adults
- 81.8
- Residents 65 and older
- 19.9%
- People per square mile
- 160
- Land area
- 414 sq mi
- Median age
- 38.7
- Median household income
- $53,522
- Adults 25+ with a bachelor's degree
- 20.3%
- Owner-occupied homes
- 72.7%
Largest cities and towns
- Marion 28,216
- Gas City 6,091
- Upland 3,819
- Fairmount 2,666
- Jonesboro 1,506
Presidential vote, 2008–2024
| Year | Democratic | Republican | Margin | Votes cast |
|---|---|---|---|---|
| 2024 | 28.2% | 69.9% | R+41.7 | 25,133 |
| 2020 | 29.5% | 68.3% | R+38.8 | 27,159 |
| 2016 | 27.8% | 67.4% | R+39.6 | 25,239 |
| 2012 | 38.0% | 60.0% | R+22.0 | 25,258 |
| 2008 | 42.9% | 56.0% | R+13.1 | 26,299 |
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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