Data / Population / Union County

Population in Union County

Population in Union County was 12,839 in 2025, according to the U.S. Census Bureau. That is down 2.2% from 2024. That is the 85th highest of 120 counties in 2025.

2025, persons12,839
Change on 2024-2.2%
Rank85th of 120Counties in Kentucky ranked
Series high13,6442020
Series low12,8392025

Population in Union County, 2020 to 2025

CSVChart (SVG)

12.8K13K13.2K13.4K13.6K13.8K2020202120222023202420252020: 13,644 persons2021: 13,262 persons2022: 13,126 persons2023: 13,091 persons2024: 13,127 persons2025: 12,839 persons
persons. Source: U.S. Census Bureau. Retrieved 2026-10-08, published 2026-03-26.
All 6 values
Periodpersons
202512,839
202413,127
202313,091
202213,126
202113,262
202013,644

Compared with Kentucky and United States

Place2025
Union County12,839
Kentucky4,606,864
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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What is the latest population in Union County? Cite the source.
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Questions

What is the population in Union County?

Population in Union County was 12,839 in 2025, according to the U.S. Census Bureau. That is down 2.2% from 2024. That is the 85th highest of 120 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 Union County?

13,644 in 2020, the highest value since 2020 in this series.

More statistics for Union County

All statistics for Union County