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   2010  +1 +5

816,193 people lived in South Dakota on July 1, 2010: the 46th-largest population among the 50 states and the District of Columbia. The median age was 36.9 years (United States: 37.2); children under 15 (20.8%) clearly outnumber residents 65 and older (14.3%): a relatively young population. There were 100.2 men for every 100 women. 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, 2010
Population
816,193
Rank by population
46th of 51
Median age
36.9
Men per 100 women
100.2
Under 15
20.8%
15–64
64.9%
65 and over
14.3%
Child dependency
32.0
Old-age dependency
22.0
Dependency ratios count children under 15 or adults 65 and over per 100 residents aged 15 to 64.
Show the population by age group, 2010
AgeMenWomenTotalShare
0-430,60029,19559,7957.3%
5-928,65027,17655,8266.8%
10-1427,75726,26254,0196.6%
15-1929,77028,03657,8067.1%
20-2429,64627,92557,5717.1%
25-2929,00726,67855,6856.8%
30-3425,89524,44350,3386.2%
35-3923,29622,41745,7135.6%
40-4424,16423,12147,2855.8%
45-4928,72828,31957,0477.0%
50-5429,84329,59359,4367.3%
55-5927,62127,02254,6436.7%
60-6422,46021,76244,2225.4%
65-6915,66316,46532,1283.9%
70-7412,07113,60425,6753.1%
75-799,49712,16821,6652.7%
80-847,44010,57218,0122.2%
85+6,33712,99019,3272.4%
How South Dakota compares with similar-sized states, 2010
RankStateResidentsRelative
43 Rhode Island 1,053,994
44 Montana 990,730
45 Delaware 899,647
46 South Dakota 816,193
47 Alaska 713,982
48 North Dakota 674,752
49 Vermont 625,886
Frequently asked questions about South Dakota's population
What is the population of South Dakota?
South Dakota had an estimated 816,193 residents on July 1, 2010, 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 36.9 years in 2010, the 32nd oldest of the 51 states and DC. That is 0.3 years younger than the national median of 37.2.
How many people in South Dakota are 65 or older?
About 116,807 residents of South Dakota (14.3%) were 65 or older in 2010, against 20.8% under 15 and 64.9% aged 15 to 64.
What does the population pyramid of South Dakota show?
In 2010, South Dakota: children under 15 (20.8%) clearly outnumber residents 65 and older (14.3%): a relatively young population. There were 100.2 men for every 100 women.
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