Plymouth County, IA Demographics
Plymouth County, IA is the 24th most populous of 99 counties in Iowa, with 25,698 residents across 863 square miles. That is about 30 people per square mile.
At the 2020 census
| Population | 25,698 |
|---|---|
| Land area | 863 sq mi |
| Density | 30 / sq mi |
Data: 2020 Census · American Community Survey 2024
How Plymouth 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: Plymouth County, IA
Measured from the county's main population center using 2020 census blocks.
We're computing the drive-time and radius areas around Plymouth County, IA — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.
Census tracts in Plymouth County, IA
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| Census Tract 9701 | 6,973 | 10.4 | 668 |
| Census Tract 9706 | 5,419 | 241.3 | 22 |
| Census Tract 9702 | 3,824 | 10.4 | 366 |
| Census Tract 9703 | 3,333 | 198.3 | 17 |
| Census Tract 9705 | 3,097 | 251.1 | 12 |
| Census Tract 9704 | 3,052 | 151.3 | 20 |
Related places
Other counties nearby
Nearest counties
Metro areas containing Plymouth County
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.