Sioux County, IA Demographics
Sioux County, IA is the 19th most populous of 99 counties in Iowa, with 35,872 residents across 768 square miles. That is about 47 people per square mile.
At the 2020 census
| Population | 35,872 |
|---|---|
| Land area | 768 sq mi |
| Density | 47 / sq mi |
Data: 2020 Census · American Community Survey 2024
How Sioux County compares to the US
We're computing this county's comparison table — check back shortly. Population, land area, and density above are already exact.
Central Location: Sioux County, IA
Measured from the county's main population center using 2020 census blocks.
We're computing the drive-time and radius areas around Sioux County, IA — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.
Census tracts in Sioux County, IA
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| Census Tract 703 | 6,644 | 167.1 | 40 |
| Census Tract 702 | 4,704 | 91.7 | 51 |
| Census Tract 704 | 4,129 | 193.4 | 21 |
| Census Tract 707.01 | 3,850 | 2.7 | 1,446 |
| Census Tract 707.02 | 3,769 | 3.4 | 1,110 |
| Census Tract 706.02 | 3,715 | 3.4 | 1,100 |
| Census Tract 701 | 3,646 | 185.0 | 20 |
| Census Tract 705 | 2,868 | 118.6 | 24 |
| Census Tract 706.01 | 2,547 | 2.8 | 922 |
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About this page
This page shows demographics for a US county from the 2020 census and the American Community Survey: population, land area, density, urban share, and how the county compares to national averages for income, housing, age, and more.
Counties subdivide into census tracts, listed below with their populations. The drive-time and radius tables measure the population around the county's main population center.