Data / Population / Douglas County

Population in Douglas County

Population in Douglas County was 19,880 in 2025, according to the U.S. Census Bureau. That is up 0.2% from 2024. That is the 58th highest of 102 counties in 2025.

2025, persons19,880
Change on 2024+0.2%
Rank58th of 102Counties in Illinois ranked
Series high19,8802025
Series low19,6842022

Population in Douglas County, 2020 to 2025

CSVChart (SVG)

19.7K19.7K19.8K19.8K19.9K19.9K2020202120222023202420252020: 19,774 persons2021: 19,706 persons2022: 19,684 persons2023: 19,757 persons2024: 19,848 persons2025: 19,880 persons
persons. Source: U.S. Census Bureau. Retrieved 2026-10-08, published 2026-03-26.
All 6 values
Periodpersons
202519,880
202419,848
202319,757
202219,684
202119,706
202019,774

Compared with Illinois and United States

Place2025
Douglas County19,880
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 Douglas County?

Population in Douglas County was 19,880 in 2025, according to the U.S. Census Bureau. That is up 0.2% from 2024. That is the 58th 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 Douglas County?

19,880 in 2025, the highest value since 2020 in this series.

More statistics for Douglas County

All statistics for Douglas County