Population By Race and Ethnicity in Dewey County, SD in 2020

Updated on January 29, 2024.

Based on the US Census Vintage data estimates, in 2020, the 5,224 population of Dewey County, South Dakota comprised of 246 people who identified as Hispanic (4.71%), and 4,978 people who identified as Non-Hispanic (95.29%).

Race: The American Indian and Alaska Native Alone population was the largest racial group in Dewey County, South Dakota with a population of 3,882 (74.31%); White Alone population was the second largest racial group with a population of 1,024 (19.6%); and Two Or More Races was the third largest racial group with a population of 272 (5.21%).

Ethnicity: The American Indian and Alaska Native Alone - Non Hispanic population was the largest ethnic group in Dewey County, South Dakota in 2020, with a population of 3,715 (71.11%); the second largest ethnic group was White Alone - Non Hispanic with a population of 969 (18.55%); and the third largest ethnic group was Two Or More Races - Non Hispanic with a population of 254 (4.86%).

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

You can find similar information for other South Dakota counties, and for South Dakota.

See this for other years:
Hispanics and Non Hispanics in Dewey County, SD in 2020
Total Population:
Race in Dewey County, SD in 2020
Total Population:
Ethnicity in Dewey County, SD in 2020
Total Population:
Population By Race in Dewey , SD in 2020
Race Population Percentage
Black or African American Alone 29 0.56%
White Alone 1,024 19.6%
American Indian and Alaska Native Alone 3,882 74.31%
Asian Alone 15 0.29%
Native Hawaiian And Pacific Islander Alone 2 0.04%
Two Or More Races 272 5.21%
Population By Ethnicity in Dewey , SD in 2020
Ethnicity Population Percentage
Black or African American Alone - Hispanic 5 0.1%
White Alone - Hispanic 55 1.05%
American Indian and Alaska Native Alone - Hispanic 167 3.2%
Asian Alone - Hispanic 1 0.02%
Native Hawaiian And Pacific Islander Alone - Hispanic 0 0%
Two Or More Races - Hispanic 18 0.35%
Black or African American Alone - Non Hispanic 24 0.46%
White Alone - Non Hispanic 969 18.55%
American Indian and Alaska Native Alone - Non Hispanic 3,715 71.11%
Asian Alone - Non Hispanic 14 0.27%
Native Hawaiian And Pacific Islander Alone - Non Hispanic 2 0.04%
Two Or More Races - Non Hispanic 254 4.86%