Sumter County Demographics

A map of Sumter County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
Black	47,939	48,536	45.8%	46.0%
White	45,700	46,442	43.6%	44.0%
Hispanic	4,655	4,302	4.4%	4.1%
Multiracial	3,995	4,135	3.8%	3.9%
Asian	1,516	1,400	1.4%	1.3%
Native American/Other	920	741	0.9%	0.7%

Sumter County, South Carolina has an estimated population of 104,725, a less than 1% change from the 105,556 recorded in the 2020 Census. The population is 45.8% Black, 43.6% White, 4.4% Hispanic, 3.8% Multiracial, 1.4% Asian, and 0.9% Native American/Other. This demographic dot map shows the population of Sumter County, with one dot drawn for each person counted by the Census, color-coded by race.

Sumter is about as racially diverse as it was in the 2020 Census. It is more diverse than South Carolina overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Sumter County, that probability was 59.2% in 2020 and 59.6% in the most recent ACS estimates.

Sumter County is ranked the 15th most populous county in South Carolina, out of 46 counties. Sumter County was ranked the 15th most populous county in the 2020 Census.

Sumter County's White Population

45,700 residents of Sumter County, or 43.6% of the population, identify as White. The share of White residents in Sumter County is significantly lower than in South Carolina overall, where 61.9% of the population is White. Sumter County ranks 36th statewide in terms of White residents as a share of the population, out of 46 counties.

Since the 2020 Census, Sumter County's White population has declined by an estimated 1.6%. White residents' share of Sumter County's population has remained roughly unchanged at 43.6%.

Sumter County is more White than neighboring Lee County (33.2% White), and Richland County (39.4% White). Sumter County is less White than neighboring Clarendon County (49.3% White), Calhoun County (54.9% White), and Kershaw County (65.8% White).

Sumter County's Black Population

47,939 residents of Sumter County, or 45.8% of the population, identify as Black. The share of Black residents in Sumter County is significantly higher than in South Carolina overall, where 24.6% of the population is Black. Sumter County ranks 10th statewide in terms of Black residents as a share of the population, out of 46 counties.

Since the 2020 Census, Sumter County's Black population has declined by an estimated 1.2%. Black residents' share of Sumter County's population has remained roughly unchanged at 45.8%.

Sumter County is more Black than neighboring Clarendon County (44.1% Black), Calhoun County (39% Black), and Kershaw County (23.7% Black). Sumter County is less Black than neighboring Lee County (62.2% Black), and Richland County (46.9% Black).

Sumter County's Asian Population

1,516 residents of Sumter County, or 1.4% of the population, identify as Asian. The share of Asian residents in Sumter County is comparable to the share in South Carolina overall, where 1.7% of the population is Asian. Sumter County ranks 12th statewide in terms of Asian residents as a share of the population, out of 46 counties.

Since the 2020 Census, Sumter County's Asian population has grown by an estimated 8.3%. Asian residents' share of Sumter County's population has remained roughly unchanged at 1.4%.

Sumter County is more Asian than neighboring Lee County (0.2% Asian), Clarendon County (0.8% Asian), Calhoun County (0.2% Asian), and Kershaw County (0.7% Asian). Sumter County is less Asian than neighboring Richland County (3% Asian).

Sumter County's Hispanic Population

4,655 residents of Sumter County, or 4.4% of the population, identify as Hispanic. The share of Hispanic residents in Sumter County is slightly lower than in South Carolina overall, where 7.4% of the population is Hispanic. Sumter County ranks 25th statewide in terms of Hispanic residents as a share of the population, out of 46 counties.

Since the 2020 Census, Sumter County's Hispanic population has grown by an estimated 8.2%. Hispanic residents' share of Sumter County's population has remained roughly unchanged at 4.4%.

Sumter County is more Hispanic than neighboring Lee County (2.4% Hispanic), Clarendon County (3.2% Hispanic), and Calhoun County (3.9% Hispanic). Sumter County is less Hispanic than neighboring Kershaw County (5.9% Hispanic), and Richland County (6.4% Hispanic).

Sumter County's Native American/Other Population

920 residents of Sumter County, or 0.9% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Sumter County is comparable to the share in South Carolina overall, where 0.7% of the population is Native American/Other. Sumter County ranks 15th statewide in terms of Native American/Other residents as a share of the population, out of 46 counties.

Since the 2020 Census, Sumter County's Native American/Other population has grown by an estimated 24.2%. Native American/Other residents' share of Sumter County's population has remained roughly unchanged at 0.9%.

Sumter County is more Native American/Other than neighboring Lee County (0.2% Native American/Other), Clarendon County (0.3% Native American/Other), Calhoun County (0% Native American/Other), Kershaw County (0.2% Native American/Other), and Richland County (0.8% Native American/Other).

Sumter County's Multiracial Population

3,995 residents of Sumter County, or 3.8% of the population, identify as Multiracial. The share of Multiracial residents in Sumter County is comparable to the share in South Carolina overall, where 3.7% of the population is Multiracial. Sumter County ranks 10th statewide in terms of Multiracial residents as a share of the population, out of 46 counties.

Since the 2020 Census, Sumter County's Multiracial population has declined by an estimated 3.4%. Multiracial residents' share of Sumter County's population has remained roughly unchanged at 3.8%.

Sumter County is more Multiracial than neighboring Lee County (1.8% Multiracial), Clarendon County (2.3% Multiracial), Calhoun County (2% Multiracial), Kershaw County (3.6% Multiracial), and Richland County (3.5% 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.