Hamlin County Demographics

A map of Hamlin County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	5,810	5,666	91.2%	91.9%
Hispanic	375	288	5.9%	4.7%
Multiracial	141	134	2.2%	2.2%
Native American/Other	21	58	0.3%	0.9%
Asian	17	13	0.3%	0.2%
Black	9	5	0.1%	0.1%

Hamlin County, South Dakota has an estimated population of 6,373, an increase from the 6,164 recorded in the 2020 Census. The population is 91.2% White, 5.9% Hispanic, 2.2% Multiracial, 0.3% Asian, 0.3% Native American/Other, and 0.1% Black. This demographic dot map shows the population of Hamlin County, with one dot drawn for each person counted by the Census, color-coded by race.

Hamlin 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 Hamlin County, that probability was 15.2% in 2020 and 16.5% in the most recent ACS estimates.

Hamlin County is ranked the 28th most populous county in South Dakota, out of 66 counties. Hamlin County was ranked the 29th most populous county in the 2020 Census.

Hamlin County's White Population

5,810 residents of Hamlin County, or 91.2% of the population, identify as White. The share of White residents in Hamlin County is considerably higher than in South Dakota overall, where 79.8% of the population is White. Hamlin County ranks 21st statewide in terms of White residents as a share of the population, out of 66 counties.

Since the 2020 Census, Hamlin County's White population has grown by an estimated 2.5%. White residents' share of Hamlin County's population has decreased from 91.9% to 91.2%.

Hamlin County is more White than neighboring Codington County (90.4% White), Brookings County (87.5% White), and Clark County (90.7% White). Hamlin County is less White than neighboring Kingsbury County (91.3% White), and Deuel County (93.9% White).

Hamlin County's Black Population

9 residents of Hamlin County, or 0.1% of the population, identify as Black. The share of Black residents in Hamlin County is comparable to the share in South Dakota overall, where 2.1% of the population is Black. Hamlin County ranks 56th statewide in terms of Black residents as a share of the population, out of 66 counties.

Since the 2020 Census, Hamlin County's Black population has grown by an estimated 80.0%. Black residents' share of Hamlin County's population has remained roughly unchanged at 0.1%.

Hamlin County is more Black than neighboring Kingsbury County (0% Black). Hamlin County is less Black than neighboring Codington County (0.7% Black), Brookings County (1% Black), Deuel County (0.5% Black), and Clark County (0.5% Black).

Hamlin County's Asian Population

17 residents of Hamlin County, or 0.3% of the population, identify as Asian. The share of Asian residents in Hamlin County is comparable to the share in South Dakota overall, where 1.4% of the population is Asian. Hamlin County ranks 43rd statewide in terms of Asian residents as a share of the population, out of 66 counties.

Since the 2020 Census, Hamlin County's Asian population has grown by an estimated 30.8%. Asian residents' share of Hamlin County's population has remained roughly unchanged at 0.3%.

Hamlin County is more Asian than neighboring Deuel County (0.1% Asian). Hamlin County is less Asian than neighboring Codington County (0.6% Asian), Kingsbury County (0.4% Asian), Brookings County (3.3% Asian), and Clark County (0.7% Asian).

Hamlin County's Hispanic Population

375 residents of Hamlin County, or 5.9% of the population, identify as Hispanic. The share of Hispanic residents in Hamlin County is comparable to the share in South Dakota overall, where 4.8% of the population is Hispanic. Hamlin County ranks 10th statewide in terms of Hispanic residents as a share of the population, out of 66 counties.

Since the 2020 Census, Hamlin County's Hispanic population has grown by an estimated 30.2%. Hispanic residents' share of Hamlin County's population has increased from 4.7% to 5.9%.

Hamlin County is more Hispanic than neighboring Codington County (3.3% Hispanic), Kingsbury County (2.9% Hispanic), Brookings County (4.6% Hispanic), Deuel County (3.1% Hispanic), and Clark County (5.3% Hispanic).

Hamlin County's Native American/Other Population

21 residents of Hamlin County, or 0.3% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Hamlin County is lower than in South Dakota overall, where 7.5% of the population is Native American/Other. Hamlin County ranks 55th statewide in terms of Native American/Other residents as a share of the population, out of 66 counties.

Since the 2020 Census, Hamlin County's Native American/Other population has declined by an estimated 63.8%. Native American/Other residents' share of Hamlin County's population has decreased from 0.9% to 0.3%.

Hamlin County is more Native American/Other than neighboring Deuel County (0% Native American/Other). Hamlin County is less Native American/Other than neighboring Codington County (2.3% Native American/Other), Kingsbury County (1.3% Native American/Other), Brookings County (0.8% Native American/Other), and Clark County (0.8% Native American/Other).

Hamlin County's Multiracial Population

141 residents of Hamlin County, or 2.2% of the population, identify as Multiracial. The share of Multiracial residents in Hamlin County is slightly lower than in South Dakota overall, where 4.4% of the population is Multiracial. Hamlin County ranks 53rd statewide in terms of Multiracial residents as a share of the population, out of 66 counties.

Since the 2020 Census, Hamlin County's Multiracial population has grown by an estimated 5.2%. Multiracial residents' share of Hamlin County's population has remained roughly unchanged at 2.2%.

Hamlin County is more Multiracial than neighboring Clark County (1.9% Multiracial). Hamlin County is less Multiracial than neighboring Codington County (2.8% Multiracial), Kingsbury County (4.1% Multiracial), Brookings County (2.8% Multiracial), and Deuel County (2.4% 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.