Corson County Demographics

A map of Corson County's Population by Race

Corson County, South Dakota has an estimated population of 3,806, a slight decrease from the 3,902 recorded in the 2020 Census. The population is 66.5% Native American/Other, 29.9% White, 3.0% Multiracial, 0.5% Hispanic, 0.0% Black, and 0.0% Asian. This demographic dot map shows the population of Corson County, with one dot drawn for each person counted by the Census, color-coded by race.

Corson has become slightly more racially diverse since the 2020 Census. It is considerably more diverse than South Dakota overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Corson County, that probability was 45.8% in 2020 and 46.7% in the most recent ACS estimates.

Corson County is ranked the 42nd most populous county in South Dakota, out of 66 counties. Corson County was ranked the 41st most populous county in the 2020 Census.

Corson County's White Population

1,138 residents of Corson County, or 29.9% of the population, identify as White. The share of White residents in Corson County is significantly lower than in South Dakota overall, where 79.8% of the population is White. Corson County ranks 61st statewide in terms of White residents as a share of the population, out of 66 counties.

Since the 2020 Census, Corson County's White population has grown by an estimated 18.9%. White residents' share of Corson County's population has increased from 24.5% to 29.9%.

Corson County is more White than neighboring Sioux County (12.1% White), Dewey County (21% White), and Ziebach County (27.1% White). Corson County is less White than neighboring Grant County (92.3% White), and Morton County (86.7% White).

Corson County's Black Population

0 residents of Corson County, or 0.0% of the population, identify as Black. The share of Black residents in Corson County is slightly lower than in South Dakota overall, where 2.1% of the population is Black. Corson County ranks 45th statewide in terms of Black residents as a share of the population, out of 66 counties.

Since the 2020 Census, Corson County's Black population has declined by an estimated 100.0%. Black residents' share of Corson County's population has remained roughly unchanged at 0.0%.

Corson County is less Black than neighboring Sioux County (0.4% Black), Dewey County (0.5% Black), Grant County (0.1% Black), and Morton County (1.6% Black).

Corson County's Asian Population

0 residents of Corson County, or 0.0% of the population, identify as Asian. The share of Asian residents in Corson County is comparable to the share in South Dakota overall, where 1.4% of the population is Asian. Corson County ranks 22nd statewide in terms of Asian residents as a share of the population, out of 66 counties.

Since the 2020 Census, Corson County's Asian population has declined by an estimated 100.0%. Asian residents' share of Corson County's population has decreased from 0.5% to 0.0%.

Corson County is less Asian than neighboring Sioux County (0.7% Asian), Dewey County (0.1% Asian), Grant County (1.5% Asian), and Morton County (0.1% Asian).

Corson County's Hispanic Population

20 residents of Corson County, or 0.5% of the population, identify as Hispanic. The share of Hispanic residents in Corson County is slightly lower than in South Dakota overall, where 4.8% of the population is Hispanic. Corson County ranks 61st statewide in terms of Hispanic residents as a share of the population, out of 66 counties.

Since the 2020 Census, Corson County's Hispanic population has declined by an estimated 56.5%. Hispanic residents' share of Corson County's population has decreased from 1.2% to 0.5%.

Corson County is less Hispanic than neighboring Sioux County (1.5% Hispanic), Dewey County (1% Hispanic), Grant County (1.2% Hispanic), Ziebach County (1.5% Hispanic), and Morton County (4.4% Hispanic).

Corson County's Native American/Other Population

2,532 residents of Corson County, or 66.5% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Corson County is significantly higher than in South Dakota overall, where 7.5% of the population is Native American/Other. Corson County ranks 6th statewide in terms of Native American/Other residents as a share of the population, out of 66 counties.

Since the 2020 Census, Corson County's Native American/Other population has declined by an estimated 6.3%. Native American/Other residents' share of Corson County's population has decreased from 69.2% to 66.5%.

Corson County is more Native American/Other than neighboring Grant County (2.3% Native American/Other), and Morton County (4.6% Native American/Other). Corson County is less Native American/Other than neighboring Sioux County (83.2% Native American/Other), Dewey County (73.8% Native American/Other), and Ziebach County (69.5% Native American/Other).

Corson County's Multiracial Population

116 residents of Corson County, or 3.0% of the population, identify as Multiracial. The share of Multiracial residents in Corson County is comparable to the share in South Dakota overall, where 4.4% of the population is Multiracial. Corson County ranks 16th statewide in terms of Multiracial residents as a share of the population, out of 66 counties.

Since the 2020 Census, Corson County's Multiracial population has declined by an estimated 32.2%. Multiracial residents' share of Corson County's population has decreased from 4.4% to 3.0%.

Corson County is more Multiracial than neighboring Sioux County (2.2% Multiracial), Grant County (2.5% Multiracial), Ziebach County (1.9% Multiracial), and Morton County (2.6% Multiracial). Corson County is less Multiracial than neighboring Dewey County (3.6% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.