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   2015  +1 +5

854,663 people lived in South Dakota on July 1, 2015: the 46th-largest population among the 50 states and the District of Columbia. The median age was 36.8 years (United States: 37.8); children under 15 (20.9%) clearly outnumber residents 65 and older (15.5%): a relatively young population. There were 101.5 men for every 100 women. Since 2010 the population has grown by 4.7%. Source: U.S. Census Bureau, Population Estimates Program, Vintage 2020 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, 2015
Population
854,663
Rank by population
46th of 51
Median age
36.8
Men per 100 women
101.5
Under 15
20.9%
15–64
63.7%
65 and over
15.5%
Child dependency
32.8
Old-age dependency
24.3
Change since 2010
+4.7%
Dependency ratios count children under 15 or adults 65 and over per 100 residents aged 15 to 64.
Show the population by age group, 2015
AgeMenWomenTotalShare
0-431,18829,82461,0127.1%
5-931,13829,39360,5317.1%
10-1429,07427,59256,6666.6%
15-1929,21027,16456,3746.6%
20-2431,63929,11960,7587.1%
25-2929,31626,78656,1026.6%
30-3429,36826,98656,3546.6%
35-3926,20624,66250,8686.0%
40-4423,59222,38545,9775.4%
45-4924,35223,18747,5395.6%
50-5428,35428,23856,5926.6%
55-5929,47329,63759,1106.9%
60-6427,31827,10054,4186.4%
65-6921,92721,51643,4435.1%
70-7414,17115,08129,2523.4%
75-799,90111,82021,7212.5%
80-847,2089,99817,2062.0%
85+7,14813,59220,7402.4%
How South Dakota compares with similar-sized states, 2015
RankStateResidentsRelative
43 Rhode Island 1,056,886
44 Montana 1,031,495
45 Delaware 942,065
46 South Dakota 854,663
47 North Dakota 755,537
48 Alaska 738,430
49 District of Columbia 677,014
Frequently asked questions about South Dakota's population
What is the population of South Dakota?
South Dakota had an estimated 854,663 residents on July 1, 2015, 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 36.8 years in 2015, the 38th oldest of the 51 states and DC. That is 1.0 years younger than the national median of 37.8.
How many people in South Dakota are 65 or older?
About 132,362 residents of South Dakota (15.5%) were 65 or older in 2015, against 20.9% under 15 and 63.7% aged 15 to 64.
What does the population pyramid of South Dakota show?
In 2015, South Dakota: children under 15 (20.9%) clearly outnumber residents 65 and older (15.5%): a relatively young population. There were 101.5 men for every 100 women.
How fast is the population of South Dakota changing?
The population of South Dakota grew by 4.7% between 2010 and 2015, and by 0.6% in the last year.
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