Share of the population by age and sex, five-year groups

Population of South Dakota, 2010–2025 · click to pick a year
Estimates up to 2019 are built on the 2010 Census, those from 2020 on the 2020 Census. A line that steps up or down between 2019 and 2020 reflects this re-basing, not a sudden change in population.

Year

-5 -1   2023  +1 +5

917,739 people lived in South Dakota on July 1, 2023: the 46th-largest population among the 50 states and the District of Columbia. The median age was 38.2 years (United States: 39.1); children (19.9%) and older adults (18.7%) make up similar shares of the population. There were 101.4 men for every 100 women. Since 2010 the population has grown by 12.4%. Source: U.S. Census Bureau, Population Estimates Program, Vintage 2025 estimates (resident population on July 1; public domain). Median age, shares, dependency ratios and rankings are calculated by PopulationPyramid.net from these estimates; the Census Bureau does not endorse this site.

Key indicators, 2023
Population
917,739
Rank by population
46th of 51
Median age
38.2
Men per 100 women
101.4
Under 15
19.9%
15–64
61.4%
65 and over
18.7%
Child dependency
32.3
Old-age dependency
30.5
Change since 2010
+12.4%
Dependency ratios count children under 15 or adults 65 and over per 100 residents aged 15 to 64.
Show the population by age group, 2023
AgeMenWomenTotalShare
0-429,34428,17557,5196.3%
5-931,56530,43061,9956.8%
10-1432,16230,58062,7426.8%
15-1933,13030,96364,0937.0%
20-2432,23629,57761,8136.7%
25-2928,98626,56555,5516.1%
30-3429,69528,03257,7276.3%
35-3930,32128,58558,9066.4%
40-4429,45127,98557,4366.3%
45-4924,91723,77648,6935.3%
50-5424,19223,74347,9355.2%
55-5925,72925,66551,3945.6%
60-6429,91430,32760,2416.6%
65-6928,11028,61056,7206.2%
70-7422,24622,88545,1314.9%
75-7914,34915,75630,1053.3%
80-848,36110,84119,2022.1%
85+7,32313,21320,5362.2%
How South Dakota compares with similar-sized states, 2023
RankStateResidentsRelative
43 Montana 1,130,612
44 Rhode Island 1,101,183
45 Delaware 1,035,354
46 South Dakota 917,739
47 North Dakota 787,071
48 Alaska 734,654
49 District of Columbia 682,559
Frequently asked questions about South Dakota's population
What is the population of South Dakota?
South Dakota had an estimated 917,739 residents on July 1, 2023, according to the U.S. Census Bureau, Population Estimates Program. That ranks 46th among the 51 states and the District of Columbia.
What is the median age in South Dakota?
The median age in South Dakota was 38.2 years in 2023, the 39th oldest of the 51 states and DC. That is 0.9 years younger than the national median of 39.1.
How many people in South Dakota are 65 or older?
About 171,694 residents of South Dakota (18.7%) were 65 or older in 2023, against 19.9% under 15 and 61.4% aged 15 to 64.
What does the population pyramid of South Dakota show?
In 2023, South Dakota: children (19.9%) and older adults (18.7%) make up similar shares of the population. There were 101.4 men for every 100 women.
How fast is the population of South Dakota changing?
The population of South Dakota grew by 12.4% between 2010 and 2023, and by 0.9% in the last year.
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