Data / Population / Decatur County

Population in Decatur County

Population in Decatur County was 11,820 in 2025, according to the U.S. Census Bureau. That is up 0.7% from 2024. That is the 87th highest of 95 counties in 2025.

2025, persons11,820
Change on 2024+0.7%
Rank87th of 95Counties in Tennessee ranked
Series high11,8202025
Series low11,3922021

Population in Decatur County, 2020 to 2025

CSVChart (SVG)

11.3K11.4K11.5K11.6K11.7K11.8K11.9K2020202120222023202420252020: 11,429 persons2021: 11,392 persons2022: 11,527 persons2023: 11,685 persons2024: 11,738 persons2025: 11,820 persons
persons. Source: U.S. Census Bureau. Retrieved 2026-10-08, published 2026-03-26.
All 6 values
Periodpersons
202511,820
202411,738
202311,685
202211,527
202111,392
202011,429

Compared with Tennessee and United States

Place2025
Decatur County11,820
Tennessee7,315,076
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.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

What is the latest population in Decatur County? Cite the source.
get_value {"indicator":"population","place":"us-county-47039"}
GET https://invokely.ai/api/v1/value?indicator=population&place=us-county-47039

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

What is the population in Decatur County?

Population in Decatur County was 11,820 in 2025, according to the U.S. Census Bureau. That is up 0.7% from 2024. That is the 87th highest of 95 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?

11,820 in 2025, the highest value since 2020 in this series.

More statistics for Decatur County

All statistics for Decatur County