Gregory County Demographics
A map of Gregory County's Population by Race
Gregory County, South Dakota has an estimated population of 4,016, a less than 1% change from the 3,994 recorded in the 2020 Census. The population is 86.2% White, 7.0% Multiracial, 4.3% Native American/Other, 1.1% Asian, 0.9% Black, and 0.6% Hispanic. This demographic dot map shows the population of Gregory County, with one dot drawn for each person counted by the Census, color-coded by race.
Gregory 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 Gregory County, that probability was 23.0% in 2020 and 25.0% in the most recent ACS estimates.
Gregory County is ranked the 40th most populous county in South Dakota, out of 66 counties. Gregory County was ranked the 39th most populous county in the 2020 Census.
Gregory County's White Population
3,462 residents of Gregory County, or 86.2% of the population, identify as White. The share of White residents in Gregory County is higher than in South Dakota overall, where 79.8% of the population is White. Gregory County ranks 35th statewide in terms of White residents as a share of the population, out of 66 counties.
Since the 2020 Census, Gregory County's White population has remained roughly the same. White residents' share of Gregory County's population has decreased from 87.4% to 86.2%.
Gregory County is more White than neighboring Brule County (81.2% White), Charles Mix County (63.7% White), and Tripp County (79.9% White). Gregory County is less White than neighboring Boyd County (90.8% White), and Keya Paha County (93.1% White).
Gregory County's Black Population
35 residents of Gregory County, or 0.9% of the population, identify as Black. The share of Black residents in Gregory County is comparable to the share in South Dakota overall, where 2.1% of the population is Black. Gregory County ranks 36th statewide in terms of Black residents as a share of the population, out of 66 counties.
Since the 2020 Census, Gregory County's Black population has grown by an estimated 288.9%. Black residents' share of Gregory County's population has increased from 0.2% to 0.9%.
Gregory County is more Black than neighboring Boyd County (0.2% Black), Brule County (0.6% Black), Charles Mix County (0.2% Black), Keya Paha County (0.1% Black), and Tripp County (0.8% Black).
Gregory County's Asian Population
43 residents of Gregory County, or 1.1% of the population, identify as Asian. The share of Asian residents in Gregory County is comparable to the share in South Dakota overall, where 1.4% of the population is Asian. Gregory County ranks 21st statewide in terms of Asian residents as a share of the population, out of 66 counties.
Since the 2020 Census, Gregory County's Asian population has grown by an estimated 104.8%. Asian residents' share of Gregory County's population has increased from 0.5% to 1.1%.
Gregory County is more Asian than neighboring Boyd County (0.2% Asian), Brule County (0% Asian), Charles Mix County (0.6% Asian), Keya Paha County (0% Asian), and Tripp County (0.4% Asian).
Gregory County's Hispanic Population
24 residents of Gregory County, or 0.6% of the population, identify as Hispanic. The share of Hispanic residents in Gregory County is slightly lower than in South Dakota overall, where 4.8% of the population is Hispanic. Gregory County ranks 58th statewide in terms of Hispanic residents as a share of the population, out of 66 counties.
Since the 2020 Census, Gregory County's Hispanic population has declined by an estimated 53.8%. Hispanic residents' share of Gregory County's population has decreased from 1.3% to 0.6%.
Gregory County is less Hispanic than neighboring Boyd County (3.3% Hispanic), Brule County (2.3% Hispanic), Charles Mix County (3% Hispanic), Keya Paha County (4.6% Hispanic), and Tripp County (1.9% Hispanic).
Gregory County's Native American/Other Population
172 residents of Gregory County, or 4.3% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Gregory County is slightly lower than in South Dakota overall, where 7.5% of the population is Native American/Other. Gregory County ranks 23rd statewide in terms of Native American/Other residents as a share of the population, out of 66 counties.
Since the 2020 Census, Gregory County's Native American/Other population has declined by an estimated 36.3%. Native American/Other residents' share of Gregory County's population has decreased from 6.8% to 4.3%.
Gregory County is more Native American/Other than neighboring Boyd County (3.6% Native American/Other), and Keya Paha County (1.9% Native American/Other). Gregory County is less Native American/Other than neighboring Brule County (10.1% Native American/Other), Charles Mix County (27.1% Native American/Other), and Tripp County (13.8% Native American/Other).
Gregory County's Multiracial Population
280 residents of Gregory County, or 7.0% of the population, identify as Multiracial. The share of Multiracial residents in Gregory County is slightly higher than in South Dakota overall, where 4.4% of the population is Multiracial. Gregory County ranks 22nd statewide in terms of Multiracial residents as a share of the population, out of 66 counties.
Since the 2020 Census, Gregory County's Multiracial population has grown by an estimated 85.4%. Multiracial residents' share of Gregory County's population has increased from 3.8% to 7.0%.
Gregory County is more Multiracial than neighboring Boyd County (2% Multiracial), Brule County (5.8% Multiracial), Charles Mix County (5.5% Multiracial), Keya Paha County (0.2% Multiracial), and Tripp County (3.1% 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.