Data / Population / Clark County

Population in Clark County

Population in Clark County was 15,114 in 2025, according to the U.S. Census Bureau. That is down 0.2% from 2024. That is the 71st highest of 102 counties in 2025.

2025, persons15,114
Change on 2024-0.2%
Rank71st of 102Counties in Illinois ranked
Series high15,4562020
Series low15,1142025

Population in Clark County, 2020 to 2025

CSVChart (SVG)

15.1K15.2K15.3K15.4K15.5K2020202120222023202420252020: 15,456 persons2021: 15,384 persons2022: 15,218 persons2023: 15,235 persons2024: 15,141 persons2025: 15,114 persons
persons. Source: U.S. Census Bureau. Retrieved 2026-10-08, published 2026-03-26.
All 6 values
Periodpersons
202515,114
202415,141
202315,235
202215,218
202115,384
202015,456

Compared with Illinois and United States

Place2025
Clark County15,114
Illinois12,719,141
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 Clark County? Cite the source.
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Questions

What is the population in Clark County?

Population in Clark County was 15,114 in 2025, according to the U.S. Census Bureau. That is down 0.2% from 2024. That is the 71st highest of 102 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 Clark County?

15,456 in 2020, the highest value since 2020 in this series.

More statistics for Clark County

All statistics for Clark County