Roberts County Demographics

A map of Roberts County's Population by Race

Roberts County, South Dakota has an estimated population of 10,221, a less than 1% change from the 10,280 recorded in the 2020 Census. The population is 56.5% White, 34.6% Native American/Other, 5.2% Multiracial, 2.6% Hispanic, 0.8% Asian, and 0.3% Black. This demographic dot map shows the population of Roberts County, with one dot drawn for each person counted by the Census, color-coded by race.

Roberts is about as racially diverse as it was in 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 Roberts County, that probability was 55.5% in 2020 and 55.8% in the most recent ACS estimates.

Roberts County is ranked the 18th most populous county in South Dakota, out of 66 counties. Roberts County was ranked the 17th most populous county in the 2020 Census.

Roberts County's White Population

5,770 residents of Roberts County, or 56.5% of the population, identify as White. The share of White residents in Roberts County is significantly lower than in South Dakota overall, where 79.8% of the population is White. Roberts County ranks 56th statewide in terms of White residents as a share of the population, out of 66 counties.

Since the 2020 Census, Roberts County's White population has grown by an estimated 3.5%. White residents' share of Roberts County's population has increased from 54.3% to 56.5%.

Roberts County is less White than neighboring Grant County (89.3% White), Traverse County (84.2% White), Big Stone County (93.6% White), Richland County (88.8% White), and Marshall County (83.7% White).

Roberts County's Black Population

33 residents of Roberts County, or 0.3% of the population, identify as Black. The share of Black residents in Roberts County is comparable to the share in South Dakota overall, where 2.1% of the population is Black. Roberts County ranks 30th statewide in terms of Black residents as a share of the population, out of 66 counties.

Since the 2020 Census, Roberts County's Black population has grown by an estimated 3.1%. Black residents' share of Roberts County's population has remained roughly unchanged at 0.3%.

Roberts County is more Black than neighboring Marshall County (0.1% Black). Roberts County is less Black than neighboring Grant County (0.4% Black), Traverse County (0.6% Black), and Richland County (0.8% Black).

Roberts County's Asian Population

83 residents of Roberts County, or 0.8% of the population, identify as Asian. The share of Asian residents in Roberts County is comparable to the share in South Dakota overall, where 1.4% of the population is Asian. Roberts County ranks 37th statewide in terms of Asian residents as a share of the population, out of 66 counties.

Since the 2020 Census, Roberts County's Asian population has grown by an estimated 207.4%. Asian residents' share of Roberts County's population has increased from 0.3% to 0.8%.

Roberts County is more Asian than neighboring Traverse County (0.1% Asian), Big Stone County (0.7% Asian), and Marshall County (0.2% Asian).

Roberts County's Hispanic Population

269 residents of Roberts County, or 2.6% of the population, identify as Hispanic. The share of Hispanic residents in Roberts County is slightly lower than in South Dakota overall, where 4.8% of the population is Hispanic. Roberts County ranks 44th statewide in terms of Hispanic residents as a share of the population, out of 66 counties.

Since the 2020 Census, Roberts County's Hispanic population has grown by an estimated 25.1%. Hispanic residents' share of Roberts County's population has increased from 2.1% to 2.6%.

Roberts County is less Hispanic than neighboring Grant County (7.4% Hispanic), Traverse County (6.1% Hispanic), Big Stone County (2.7% Hispanic), Richland County (3.8% Hispanic), and Marshall County (6.4% Hispanic).

Roberts County's Native American/Other Population

3,537 residents of Roberts County, or 34.6% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Roberts County is significantly higher than in South Dakota overall, where 7.5% of the population is Native American/Other. Roberts County ranks 11th statewide in terms of Native American/Other residents as a share of the population, out of 66 counties.

Since the 2020 Census, Roberts County's Native American/Other population has declined by an estimated 10.5%. Native American/Other residents' share of Roberts County's population has decreased from 38.4% to 34.6%.

Roberts County is more Native American/Other than neighboring Grant County (0.3% Native American/Other), Traverse County (4% Native American/Other), Big Stone County (0.5% Native American/Other), Richland County (2.6% Native American/Other), and Marshall County (5.8% Native American/Other).

Roberts County's Multiracial Population

529 residents of Roberts County, or 5.2% of the population, identify as Multiracial. The share of Multiracial residents in Roberts County is comparable to the share in South Dakota overall, where 4.4% of the population is Multiracial. Roberts County ranks 13th statewide in terms of Multiracial residents as a share of the population, out of 66 counties.

Since the 2020 Census, Roberts County's Multiracial population has grown by an estimated 10.4%. Multiracial residents' share of Roberts County's population has increased from 4.7% to 5.2%.

Roberts County is more Multiracial than neighboring Grant County (1.9% Multiracial), Traverse County (5% Multiracial), Big Stone County (2.2% Multiracial), Richland County (3.3% Multiracial), and Marshall County (3.8% 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.