Data / Population / Richland County

Population in Richland County

Population in Richland County was 15,219 in 2025, according to the U.S. Census Bureau. That is down 1% from 2024. That is the 69th highest of 102 counties in 2025.

2025, persons15,219
Change on 2024-1%
Rank69th of 102Counties in Illinois ranked
Series high15,8082020
Series low15,2192025

Population in Richland County, 2020 to 2025

CSVChart (SVG)

15.2K15.4K15.6K15.8K16K2020202120222023202420252020: 15,808 persons2021: 15,789 persons2022: 15,527 persons2023: 15,510 persons2024: 15,368 persons2025: 15,219 persons
persons. Source: U.S. Census Bureau. Retrieved 2026-10-08, published 2026-03-26.
All 6 values
Periodpersons
202515,219
202415,368
202315,510
202215,527
202115,789
202015,808

Compared with Illinois and United States

Place2025
Richland County15,219
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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Questions

What is the population in Richland County?

Population in Richland County was 15,219 in 2025, according to the U.S. Census Bureau. That is down 1% from 2024. That is the 69th 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 Richland County?

15,808 in 2020, the highest value since 2020 in this series.

More statistics for Richland County

All statistics for Richland County