Data / Population density / Sioux County

Population density in Sioux County

Population density in Sioux County was 18.5 inhabitants per km² in 2025, according to the U.S. Census Bureau. That is unchanged from 2024. That is the 23rd highest of 99 counties in 2025.

2025, inhabitants per km²18.5
Change on 2024-0%
Rank23rd of 99Counties in Iowa ranked
Series high18.52024
Series low182020

Population density in Sioux County, 2020 to 2025

CSVChart (SVG)

1818.118.218.318.418.52020202120222023202420252020: 18 inhabitants per km²2021: 18.1 inhabitants per km²2022: 18.2 inhabitants per km²2023: 18.3 inhabitants per km²2024: 18.5 inhabitants per km²2025: 18.5 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
202518.5
202418.5
202318.3
202218.2
202118.1
202018

Compared with Iowa and United States

Place2025
Sioux County18.5
Iowa22.4
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.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

What is the latest population density in Sioux County? Cite the source.
get_value {"indicator":"population_density","place":"us-county-19167"}
GET https://invokely.ai/api/v1/value?indicator=population_density&place=us-county-19167

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

What is the population density in Sioux County?

Population density in Sioux County was 18.5 inhabitants per km² in 2025, according to the U.S. Census Bureau. That is unchanged from 2024. That is the 23rd highest of 99 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 Sioux County?

18.5 inhabitants per km² in 2024, the highest value since 2020 in this series.

More statistics for Sioux County

All statistics for Sioux County