Data as of November 4, 2026 · refreshed automatically from the official Indiana voter file
DeKalb County, Indiana has 30,040 active registered voters across 39 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 DeKalb County voted for president
Election results are public records.
DeKalb County at a glance.
DeKalb County had an estimated 44,330 residents in July 2024, the 35th most populous of Indiana's 92 counties, up 2.4% since the 2020 census. Of those, 33,884 are 18 or older, the voting-age population, and 18.2% are 65 or older. Its 30,040 active registered voters equal about 88.7% of that voting-age population.
It covers 363 square miles of land (122 people per square mile). The largest cities and towns are Auburn (13,989), Garrett (6,663), Butler (2,669), Waterloo (2,157) and Ashley (part) (679). The American Community Survey (2020-2024) puts it at a median age of 38.4, a median household income of $74,331, 20.2% of adults 25 and older holding a bachelor's degree or higher and 82.1% of occupied homes owned by the people living in them.
In 2024, 19,785 votes were cast for president, about 58.4% of the voting-age population; the Democratic ticket took 25.6% and the Republican ticket 72.7%. The two-party margin moved from R+15.2 in 2008 to R+47.1 in 2024.
- Population (2024 estimate)
- 44,330
- Population (2020 census base)
- 43,272
- Voting-age population (18+)
- 33,884
- Active voters per 100 adults
- 88.7
- Residents 65 and older
- 18.2%
- People per square mile
- 122
- Land area
- 363 sq mi
- Median age
- 38.4
- Median household income
- $74,331
- Adults 25+ with a bachelor's degree
- 20.2%
- Owner-occupied homes
- 82.1%
Largest cities and towns
- Auburn 13,989
- Garrett 6,663
- Butler 2,669
- Waterloo 2,157
- Ashley (part) 679
Presidential vote, 2008–2024
| Year | Democratic | Republican | Margin | Votes cast |
|---|---|---|---|---|
| 2024 | 25.6% | 72.7% | R+47.1 | 19,785 |
| 2020 | 25.3% | 72.5% | R+47.2 | 19,628 |
| 2016 | 23.4% | 71.7% | R+48.3 | 16,816 |
| 2012 | 33.2% | 64.9% | R+31.7 | 16,314 |
| 2008 | 41.8% | 57.0% | R+15.2 | 17,149 |
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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