Pennington County, SD Demographics
Pennington County, SD is the 2nd most populous of 66 counties in South Dakota, with 109,222 residents across 2,777 square miles. That is about 39 people per square mile.
At the 2020 census
| Population | 109,222 |
|---|---|
| Land area | 2,777 sq mi |
| Density | 39 / sq mi |
Data: 2020 Census · American Community Survey 2024
How Pennington 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: Pennington County, SD
Measured from the county's main population center using 2020 census blocks.
We're computing the drive-time and radius areas around Pennington County, SD — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.
Census tracts in Pennington County, SD
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| Census Tract 114 | 8,657 | 25.7 | 337 |
| Census Tract 109.08 | 7,499 | 14.4 | 522 |
| Census Tract 110.02 | 6,946 | 4.9 | 1,430 |
| Census Tract 110.04 | 6,790 | 24.1 | 282 |
| Census Tract 113 | 6,707 | 37.7 | 178 |
| Census Tract 109.05 | 6,518 | 18.2 | 357 |
| Census Tract 109.06 | 5,794 | 4.7 | 1,243 |
| Census Tract 109.04 | 4,649 | 1.1 | 4,268 |
| Census Tract 117 | 3,996 | 596.4 | 7 |
| Census Tract 107 | 3,983 | 0.9 | 4,438 |
| Census Tract 116.02 | 3,957 | 1,623.2 | 2 |
| Census Tract 104 | 3,853 | 1.5 | 2,540 |
| Census Tract 116.01 | 3,772 | 262.7 | 14 |
| Census Tract 108 | 3,741 | 1.8 | 2,129 |
| Census Tract 102.01 | 3,465 | 0.5 | 6,603 |
| Census Tract 106 | 3,460 | 1.0 | 3,354 |
| Census Tract 103 | 3,385 | 1.8 | 1,915 |
| Census Tract 109.07 | 3,363 | 11.1 | 303 |
| Census Tract 105 | 3,344 | 1.7 | 1,966 |
| Census Tract 111 | 2,844 | 1.0 | 2,923 |
| Census Tract 112 | 2,832 | 1.2 | 2,404 |
| Census Tract 118 | 2,662 | 4.9 | 549 |
| Census Tract 110.01 | 2,563 | 1.2 | 2,136 |
| Census Tract 102.02 | 2,262 | 1.2 | 1,847 |
| Census Tract 110.05 | 2,180 | 134.0 | 16 |
Related places
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Metro areas containing Pennington 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.