Pennington County, South Dakota

Pennington County, South Dakota, had an estimated population of 116,792 in 2025 across 7,192 km². The figures below come from the US Census Bureau's population estimates and the American Community Survey, each shown with its own vintage and its rank among South Dakota's counties and nationally.

Population: 116,792; 2025 estimate
Area: 7,192 km²
Density: 16; per km²
Median income: $74,517; household, ACS 2024
Median age: 40.1; years, ACS 2024

How South Dakota's counties spread

Amenities & Infrastructure

Indicator	Value	In South Dakota	In the US
Households with Broadband2024	90.6%	10 / 66	686 / 3,144
Median Gross Rent2024	$1,120	3 / 66	674 / 3,137
Median Home Value2024	$302,200	5 / 66	615 / 3,139
Owner-Occupied Homes2024	69.3%	49 / 66	2,313 / 3,144
Vacant Homes2024	10.3%	51 / 66	2,141 / 3,144

Demography

Indicator	Value	In South Dakota	In the US
Aged 65 and Over2024	20.1%	40 / 66	1,517 / 3,144
American Indian & Alaska Native2024	6.0%	21 / 66	155 / 3,144
Asian, non-Hispanic2024	1.2%	11 / 66	875 / 3,144
Average Household Size2024people	2.4	39 / 66	1,911 / 3,144
Black, non-Hispanic2024	1.1%	13 / 66	1,939 / 3,144
Foreign-Born2024	2.5%	22 / 66	1,721 / 3,144
Hispanic or Latino2024	5.7%	11 / 66	1,425 / 3,144
Median Age2024years	40.1	40 / 66	1,998 / 3,144
Sex Ratio2024per 1,000 males	960	40 / 66	2,362 / 3,144
Speak a Language Other Than English2024	4.4%	40 / 66	1,857 / 3,144
Under 182024	22.0%	48 / 66	1,479 / 3,144
Veterans2024	12.3%	4 / 66	131 / 3,144
White, non-Hispanic2024	77.8%	52 / 66	1,696 / 3,144

Economy

Indicator	Value	In South Dakota	In the US
Below Poverty Line2024	11.2%	30 / 66	2,067 / 3,144
Households on SNAP2024	8.1%	22 / 66	2,298 / 3,144
Income Inequality2024index	0.460	22 / 66	1,068 / 3,144
Median Household Income2024	$74,517	24 / 66	867 / 3,143
Per Capita Income2024	$42,302	19 / 66	612 / 3,144
Unemployment Rate2024	3.2%	21 / 66	2,324 / 3,144

Education

Indicator	Value	In South Dakota	In the US
Bachelor's Degree or Higher2024	34.6%	8 / 66	475 / 3,144
High School or Higher2024	94.6%	14 / 66	350 / 3,144

Health Coverage

Indicator	Value	In South Dakota	In the US
No Health Insurance2024	10.2%	21 / 66	1,013 / 3,144
With a Disability2024	15.6%	9 / 66	1,673 / 3,144

Population & Density

Indicator	Value	In South Dakota	In the US
Population2025	116,792	2 / 66	550 / 3,144
Population Density2025/km²	16	7 / 66	1,615 / 3,144

Work & Commute

Indicator	Value	In South Dakota	In the US
Commute by Public Transit2024	0.2%	25 / 66	1,371 / 3,144
Households with No Vehicle2024	5.6%	22 / 66	1,440 / 3,144
Mean Commute Time2024minutes	19.4	21 / 66	2,572 / 3,143
Work from Home2024	9.6%	35 / 66	1,302 / 3,144

Other counties of South Dakota

Compare Pennington County against every other county on a map, add layers and run a scatter — open the atlas. Sources and vintages for every figure on this page are listed under datasets, or browse all 3,144 counties.