Day County, SD Demographics
Day County, SD is the 32nd most populous of 66 counties in South Dakota, with 5,449 residents across 1,028 square miles. That is about 5 people per square mile.
At the 2020 census
| Population | 5,449 |
|---|---|
| Land area | 1,028 sq mi |
| Density | 5 / sq mi |
Data: 2020 Census · American Community Survey 2024
How Day 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: Day County, SD
Measured from the county's main population center using 2020 census blocks.
We're computing the drive-time and radius areas around Day County, SD — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.
Census tracts in Day County, SD
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| Census Tract 9528 | 1,981 | 21.4 | 92 |
| Census Tract 9529 | 1,893 | 385.9 | 5 |
| Census Tract 9527 | 1,575 | 621.1 | 3 |
Related places
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.