What is the population of Pennington County?

The population of Pennington County, SD is 115,926.

Where is Pennington County located?

Pennington County, SD is located at latitude 44.0037300 and longitude -102.8238300. It is in United States.

What is the area of Pennington County?

The area of Pennington County, SD is 7211 km².

What is the elevation of Pennington County?

Pennington County, SD has an elevation of 930 meters (3051 feet) above sea level.

What time zone is Pennington County in?

Pennington County, SD is in the America/Denver time zone.

How has the population of Pennington County changed?

The population of Pennington County, SD has increased from 100,948 (2010) to 115,926 (2020), a change of 14.8%.

Pennington County, South Dakota

Pennington County: county in South Dakota, United States of America.

About

Pennington County is a county located in the U.S. state of South Dakota. As of the 2010 census, the population was 100,948 and a population density of 14 people per km². After 10 years in 2020 county had an estimated population of 115,926 inhabitants. Its county seat is Rapid City. The county was created 151 years ago in 1874.

Pennington County locator map — Location of Pennington County on South Dakota map.

County Snapshot

Pennington County at a glance

Pennington County currently has 4 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.

Browse county places

Mapped populated places

These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.

South Dakota counties

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Largest city

Rapid City

Population 77,503

Quick Facts about Pennington County

Population	115,926 (2020)
Country	United States of America
State	South Dakota (United States)
Different from	Pennington County
Area	7211 km²
Water as percent of area	0.3%
Land as percent of area	99.7%
Latitude & Longitude	44.0037,-102.8238
Named for	John L. Pennington
Altitude	2,953 feet / 900 meters
Capital	Rapid City
Establishment	January 01, 1875
Time Zone	America/Denver
Local time	05:13:02 (23rd September 2026)
Density	16 Pop. per km² as of 2020
Population growth	14.84% (2010-2020)
Weather	53℉ Mostly Cloudy 7-days weather

Pennington County Courthouse 2017 image

Geography

Pennington County is located at 44°0'13"N 102°49'26"W (44.0037300, -102.8238300). It has 2 neighbors: Meade County and Custer County.

Pennington County map

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The largest city of Pennington County is Rapid City with a population of 77,503. Other cities include and Box Elder population 7,165. See all Pennington County cities & populated places.

Pennington County Populated Places

Cities, towns, neighborhoods & other populated places in Pennington County.

City Name	Population	Title
Rapid City	77,503	The second most populous city in South Dakota.
Rapid Valley	8,260	Census-designated place in Pennington County, South Dakota
Box Elder	7,165	City in Pennington County, South Dakota, United States
Colonial Pine Hills	2,493	Township in Pennington County, South Dakota

Weather

53°F

Mostly Cloudy

16 to 20 mph SE Tuesday Night

Mostly cloudy, with a low around 53. Southeast wind 16 to 20 mph, with gusts as high as 32 mph.

7-Day Forecast

Official website of Pennington County

Official Website

Pennington County has 2 neighbours.

Meade County county in South Dakota, United States.
Custer County county in South Dakota, United States of America.

Rapid City

Demographics

The population of Pennington County increased by 14.84% in 10 years.

Year	Population	% Change	Method
2010	100,948	-	census
2011	102,404	1.44%	estimation process
2012	104,232	1.79%	estimation process
2013	105,919	1.62%	estimation process
2014	107,510	1.5%	estimation process
2015	108,088	0.54%	estimation process
2016	109,111	0.95%	estimation process
2017	110,503	1.28%	estimation process
2018	111,950	1.31%	estimation process
2019	113,775	1.63%	estimation process
2020	115,926	1.89%	estimation process

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Other places with the same name (1)

Pennington County, Minnesota county in Minnesota, United States. with a population of 13,874 people.

South Dakota Other Counties (more counties)

County Name	Population	Title
Minnehaha County	196,659	County in South Dakota, United States of America
Sioux Falls	157,584	The largest city in South Dakota.
Rapid City	77,503	The second most populous city in South Dakota.
Lincoln County	63,019	County in South Dakota, United States
Brown County	38,738	County in South Dakota, United States
Brookings County	35,603	County in South Dakota, United States of America
Meade County	28,588	County in South Dakota, United States
Codington County	28,186	County in South Dakota, United States of America
Lawrence County	26,221	County in South Dakota, United States
Yankton County	22,742	County in South Dakota, United States
Watertown	22,303	City in and county seat of Codington County, South Dakota, United States
Davison County	19,812	County in South Dakota, United States of America
Beadle County	18,513	County in South Dakota, United States
Hughes County	17,336	County in Oklahoma, United States
Union County	16,192	County in South Dakota, United States
Mitchell	15,697	City in and county seat of Davison County, South Dakota, United States