Data / Population / Jersey County

Population in Jersey County

Population in Jersey County was 21,160 in 2025, according to the U.S. Census Bureau. That is unchanged from 2024. That is the 54th highest of 102 counties in 2025.

2025, persons21,160
Change on 20240%
Rank54th of 102Counties in Illinois ranked
Series high21,4932020
Series low21,1552024

Population in Jersey County, 2020 to 2025

CSVChart (SVG)

21.1K21.2K21.3K21.4K21.5K2020202120222023202420252020: 21,493 persons2021: 21,363 persons2022: 21,222 persons2023: 21,168 persons2024: 21,155 persons2025: 21,160 persons
persons. Source: U.S. Census Bureau. Retrieved 2026-10-08, published 2026-03-26.
All 6 values
Periodpersons
202521,160
202421,155
202321,168
202221,222
202121,363
202021,493

Compared with Illinois and United States

Place2025
Jersey County21,160
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 Jersey County? Cite the source.
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Questions

What is the population in Jersey County?

Population in Jersey County was 21,160 in 2025, according to the U.S. Census Bureau. That is unchanged from 2024. That is the 54th 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 Jersey County?

21,493 in 2020, the highest value since 2020 in this series.

More statistics for Jersey County

All statistics for Jersey County