Data / Population / Randolph County

Population in Randolph County

Population in Randolph County was 29,921 in 2025, according to the U.S. Census Bureau. That is up 0.2% from 2024. That is the 47th highest of 102 counties in 2025.

2025, persons29,921
Change on 2024+0.2%
Rank47th of 102Counties in Illinois ranked
Series high30,2152021
Series low29,8052023

Population in Randolph County, 2020 to 2025

CSVChart (SVG)

29.8K29.9K30K30.1K30.2K30.3K2020202120222023202420252020: 30,091 persons2021: 30,215 persons2022: 29,942 persons2023: 29,805 persons2024: 29,870 persons2025: 29,921 persons
persons. Source: U.S. Census Bureau. Retrieved 2026-10-08, published 2026-03-26.
All 6 values
Periodpersons
202529,921
202429,870
202329,805
202229,942
202130,215
202030,091

Compared with Illinois and United States

Place2025
Randolph County29,921
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 Randolph County?

Population in Randolph County was 29,921 in 2025, according to the U.S. Census Bureau. That is up 0.2% from 2024. That is the 47th 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 Randolph County?

30,215 in 2021, the highest value since 2020 in this series.

More statistics for Randolph County

All statistics for Randolph County