Data / Population / Decatur County

Population in Decatur County

Population in Decatur County was 26,576 in 2025, according to the U.S. Census Bureau. That is up 0.2% from 2024. That is the 59th highest of 92 counties in 2025.

2025, persons26,576
Change on 2024+0.2%
Rank59th of 92Counties in Indiana ranked
Series high26,5762025
Series low26,3082021

Population in Decatur County, 2020 to 2025

CSVChart (SVG)

26.3K26.4K26.5K26.6K2020202120222023202420252020: 26,467 persons2021: 26,308 persons2022: 26,409 persons2023: 26,366 persons2024: 26,514 persons2025: 26,576 persons
persons. Source: U.S. Census Bureau. Retrieved 2026-10-08, published 2026-03-26.
All 6 values
Periodpersons
202526,576
202426,514
202326,366
202226,409
202126,308
202026,467

Compared with Indiana and United States

Place2025
Decatur County26,576
Indiana6,973,333
United States341,784,857

Rankings

Definition

Resident population. Spain and the EU: 1 January, with Spanish figures from the official municipal register (Padrón). United States: Census Bureau population estimates for 1 July. Other countries and the World: World Bank mid-year estimates, which count all residents regardless of legal status or citizenship.

For Denmark, Statistics Denmark counts the registered resident population on 1 January. Greenland and the Faroe Islands are excluded. The annual series selects the first-quarter reference date from FOLK1A. The World Bank series exists for every country, so use it (through compare) to rank countries on one basis.

How to cite

U.S. Census Bureau. Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-08.

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Questions

What is the population in Decatur County?

Population in Decatur County was 26,576 in 2025, according to the U.S. Census Bureau. That is up 0.2% from 2024. That is the 59th highest of 92 counties in 2025.

Where does this figure come from?

U.S. Census Bureau. Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). Retrieved by Invokely on 2026-10-08.

What was the highest population in Decatur County?

26,576 in 2025, the highest value since 2020 in this series.

More statistics for Decatur County

All statistics for Decatur County