Data / Population density / Lee County

Population density in Lee County

Population density in Lee County was 17.5 inhabitants per km² in 2025, according to the U.S. Census Bureau. That is up 0.2% from 2024. That is the 50th highest of 102 counties in 2025.

2025, inhabitants per km²17.5
Change on 2024+0.2%
Rank50th of 102Counties in Illinois ranked
Series high18.12020
Series low17.52024

Population density in Lee County, 2020 to 2025

CSVChart (SVG)

17.417.617.81818.22020202120222023202420252020: 18.1 inhabitants per km²2021: 18.1 inhabitants per km²2022: 17.8 inhabitants per km²2023: 17.5 inhabitants per km²2024: 17.5 inhabitants per km²2025: 17.5 inhabitants per km²
inhabitants per km². Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09, published 2026-03-26.
All 6 values
Periodinhabitants per km²
202517.5
202417.5
202317.5
202217.8
202118.1
202018.1

Compared with Illinois and United States

Place2025
Lee County17.5
Illinois88.5
United States37.3

Rankings

Definition

Resident population divided by land area in km². World Bank figures use mid-year population and land area excluding inland water.

United States: Census Bureau population estimates for 1 July divided by land area (water excluded) from the latest Census Gazetteer files. US tables often give people per square mile; multiply persons per km² by 2.59 to compare.

How to cite

U.S. Census Bureau. Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-09.

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Questions

What is the population density in Lee County?

Population density in Lee County was 17.5 inhabitants per km² in 2025, according to the U.S. Census Bureau. That is up 0.2% from 2024. That is the 50th highest of 102 counties in 2025.

Where does this figure come from?

U.S. Census Bureau. Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². Retrieved by Invokely on 2026-10-09.

What was the highest population density in Lee County?

18.1 inhabitants per km² in 2020, the highest value since 2020 in this series.

More statistics for Lee County

All statistics for Lee County