Fall River County Demographics

A map of Fall River County's Population by Race

Fall River County, South Dakota has an estimated population of 7,258, an increase from the 6,973 recorded in the 2020 Census. The population is 83.9% White, 6.0% Native American/Other, 4.7% Multiracial, 3.4% Hispanic, 1.9% Asian, and 0.0% Black. This demographic dot map shows the population of Fall River County, with one dot drawn for each person counted by the Census, color-coded by race.

Fall River has become more racially diverse since the 2020 Census. It is considerably less 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 Fall River County, that probability was 26.9% in 2020 and 28.9% in the most recent ACS estimates.

Fall River County is ranked the 25th most populous county in South Dakota, out of 66 counties. Fall River County was ranked the 26th most populous county in the 2020 Census.

Fall River County's White Population

6,088 residents of Fall River County, or 83.9% of the population, identify as White. The share of White residents in Fall River County is slightly higher than in South Dakota overall, where 79.8% of the population is White. Fall River County ranks 41st statewide in terms of White residents as a share of the population, out of 66 counties.

Since the 2020 Census, Fall River County's White population has grown by an estimated 2.6%. White residents' share of Fall River County's population has decreased from 85.1% to 83.9%.

Fall River County is more White than neighboring Oglala Lakota County (7% White). Fall River County is less White than neighboring Custer County (87.7% White), Dawes County (85.8% White), Sioux County (95.5% White), and Niobrara County (87% White).

Fall River County's Black Population

0 residents of Fall River County, or 0.0% of the population, identify as Black. The share of Black residents in Fall River County is slightly lower than in South Dakota overall, where 2.1% of the population is Black. Fall River County ranks 16th statewide in terms of Black residents as a share of the population, out of 66 counties.

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

Fall River County is less Black than neighboring Custer County (0.3% Black), Dawes County (0.5% Black), Sioux County (0.1% Black), Niobrara County (3.5% Black), and Oglala Lakota County (0.1% Black).

Fall River County's Asian Population

140 residents of Fall River County, or 1.9% of the population, identify as Asian. The share of Asian residents in Fall River County is comparable to the share in South Dakota overall, where 1.4% of the population is Asian. Fall River County ranks 15th statewide in terms of Asian residents as a share of the population, out of 66 counties.

Since the 2020 Census, Fall River County's Asian population has grown by an estimated 197.9%. Asian residents' share of Fall River County's population has increased from 0.7% to 1.9%.

Fall River County is more Asian than neighboring Custer County (0.4% Asian), Dawes County (1.1% Asian), Sioux County (0.2% Asian), Niobrara County (0% Asian), and Oglala Lakota County (0% Asian).

Fall River County's Hispanic Population

249 residents of Fall River County, or 3.4% of the population, identify as Hispanic. The share of Hispanic residents in Fall River County is comparable to the share in South Dakota overall, where 4.8% of the population is Hispanic. Fall River County ranks 30th statewide in terms of Hispanic residents as a share of the population, out of 66 counties.

Since the 2020 Census, Fall River County's Hispanic population has grown by an estimated 38.3%. Hispanic residents' share of Fall River County's population has increased from 2.6% to 3.4%.

Fall River County is more Hispanic than neighboring Custer County (3.1% Hispanic), Sioux County (2.1% Hispanic), and Oglala Lakota County (1.9% Hispanic). Fall River County is less Hispanic than neighboring Dawes County (5% Hispanic), and Niobrara County (5.6% Hispanic).

Fall River County's Native American/Other Population

439 residents of Fall River County, or 6.0% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Fall River County is comparable to the share in South Dakota overall, where 7.5% of the population is Native American/Other. Fall River County ranks 25th statewide in terms of Native American/Other residents as a share of the population, out of 66 counties.

Since the 2020 Census, Fall River County's Native American/Other population has grown by an estimated 1.9%. Native American/Other residents' share of Fall River County's population has remained roughly unchanged at 6.0%.

Fall River County is more Native American/Other than neighboring Custer County (3.4% Native American/Other), Dawes County (2.8% Native American/Other), Sioux County (0.6% Native American/Other), and Niobrara County (2.2% Native American/Other). Fall River County is less Native American/Other than neighboring Oglala Lakota County (90.8% Native American/Other).

Fall River County's Multiracial Population

342 residents of Fall River County, or 4.7% of the population, identify as Multiracial. The share of Multiracial residents in Fall River County is comparable to the share in South Dakota overall, where 4.4% of the population is Multiracial. Fall River County ranks 10th statewide in terms of Multiracial residents as a share of the population, out of 66 counties.

Since the 2020 Census, Fall River County's Multiracial population has declined by an estimated 1.7%. Multiracial residents' share of Fall River County's population has remained roughly unchanged at 4.7%.

Fall River County is more Multiracial than neighboring Sioux County (1.5% Multiracial), Niobrara County (1.8% Multiracial), and Oglala Lakota County (0.2% Multiracial). Fall River County is less Multiracial than neighboring Custer County (5% Multiracial), and Dawes County (4.8% 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.