Dewey, South Dakota Census 2020 Population By Race and Ethnicity

Updated on February 22, 2026.

According to the data from the US 2020 decennial Census, in April 2020, the 5.24K population of Dewey, SD residents comprised of 81 residents who identified as Hispanic or Latino (1.55%), and 5.16K residents who identified as Non-Hispanic (98.45%).

Race: The American Indian and Alaska Native Alone population was the largest racial group in Dewey, SD, with a population of 4.14K (78.95%). The White Alone population was the second largest racial group in Dewey, SD, with a population of 855 (16.32%). The Two Or More Races population was the third largest racial group in Dewey, SD, with a population of 219 (4.18%). The smallest racial group in Dewey, SD was Native Hawaiian And Pacific Islander Alone with a population of 0 (0.00%).

Ethnicity: The Non-Hispanic - American Indian & Alaska Native population was the largest ethnic group in Dewey, SD, with a population of 4.08K (77.92%). The Non-Hispanic - White Alone population was the second largest ethnic group in Dewey, SD, with a population of 849 (16.20%). The Non-Hispanic - Two or More Races population was the third largest ethnic group in Dewey, SD, with a population of 208 (3.97%). The smallest ethnic group in Dewey, SD was Hispanic - Native Hawaiian & Pac. Islander with a population of 0 (0.00%).

The charts and tables below shows the population and percentage of each racial group and ethnicity group in Dewey, South Dakota from the 2020 decennial census.

You can see similar information for other South Dakota counties and also for the state of South Dakota.

Dewey, SD Hispanics and Non Hispanics Population in Census 2020
Total Population:
Dewey, SD Racial Groups in Census 2020
Total Population:
Dewey, SD Ethnicity Groups in Census 2020
Total Population:
Dewey, SD Population of Racial Groups in Census 2020
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Race Population % of County Population
Black or African American Alone 9 0.17
White Alone 855 16.32
American Indian and Alaska Native Alone 4136 78.95
Asian Alone 6 0.12
Native Hawaiian And Pacific Islander Alone 0 0.00
Some Other Race Alone 14 0.27
Two Or More Races 219 4.18
Dewey, SD Population of Ethnicity Groups in Census 2020
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Ethnicity Population % of County Population
Non-Hispanic - American Indian & Alaska Native 4082 77.92
Non-Hispanic - White Alone 849 16.20
Non-Hispanic - Two or More Races 208 3.97
Hispanic - American Indian & Alaska Native 54 1.03
Hispanic - Two or More Races 11 0.21
Hispanic - Some Other Race Alone 10 0.19
Non-Hispanic - Black Alone 9 0.17
Hispanic - White Alone 6 0.12
Non-Hispanic - Asian Alone 6 0.12
Non-Hispanic - Some Other Race Alone 4 0.08
Hispanic - Black Alone 0 0.00
Hispanic - Asian Alone 0 0.00
Non-Hispanic - Native Hawaiian & Pac. Islander 0 0.00
Hispanic - Native Hawaiian & Pac. Islander 0 0.00