Gregory County, SD Demographics
Gregory County, SD is the 39th most populous of 66 counties in South Dakota, with 3,994 residents across 1,015 square miles. That is about 4 people per square mile.
At the 2020 census
| Population | 3,994 |
|---|---|
| Land area | 1,015 sq mi |
| Density | 4 / sq mi |
Data: 2020 Census · American Community Survey 2024
How Gregory 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: Gregory County, SD
Measured from the county's main population center using 2020 census blocks.
We're computing the drive-time and radius areas around Gregory County, SD — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.
Census tracts in Gregory County, SD
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| Census Tract 9712 | 2,065 | 648.5 | 3 |
| Census Tract 9711 | 1,929 | 366.5 | 5 |
Related places
Other counties nearby
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.