Demographics: South Dakota
Population and income data for South Dakota. Source: US Census Bureau ACS 2022
ACS 5-year estimates · Data as of 2022 · Updated annually
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909,824
Total Population
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$62,498
Median Household Income
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37.1 yrs
Median Age
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355,453
Total Households
Key Figures
Avg. monthly household income$5,208
Average household size2.6 people
Population rankingSouth Dakota (SD)
About South Dakota Demographics
South Dakota (SD) has a population of 909,824 with a median household income of $62,498. The median age is 37.1 years. Data is from the US Census Bureau American Community Survey 5-year estimates (2022).
The median household income of $62,498 translates to approximately $5,208 per month. There are 355,453 total households in the state, giving an average household size of 2.6 people.
Major Cities in South Dakota
- Sioux Falls
- Rapid City
Data Source
All data from the US Census Bureau American Community Survey (ACS 5-year 2022), a public domain dataset updated annually.
Frequently Asked Questions
What is the US Census ACS survey?▾
The American Community Survey (ACS) is an ongoing survey conducted by the US Census Bureau. Unlike the decennial census, it's conducted every year and provides detailed demographic, social, economic, and housing statistics. The 5-year estimates used here pool data from 5 years of surveys for greater statistical reliability.
How is median household income calculated?▾
Median household income is the middle value of all household incomes — half of households earn more, half earn less. It includes wages, salaries, self-employment income, and other income sources. It's considered more representative than average income because it's less affected by extreme high-income households.
Where can I find city-level demographic data?▾
You can find city-level data for South Dakota by browsing the individual city pages on this site, or by visiting the US Census Bureau's data.census.gov portal directly. The ACS collects data for cities, counties, zip codes, and census tracts.
How often is demographic data updated?▾
Census Bureau ACS data is updated annually, typically released about 12-18 months after the reference year. The 5-year estimates are the most reliable for small areas and smaller population groups. Decennial census data is collected every 10 years (last: 2020).