Williamston, SC Demographics

A map of Williamston's Population by Race

Williamston, South Carolina has an estimated population of 4,170, an increase from the 4,043 recorded in the 2020 Census. The population is 78.1% White, 8.9% Black, 6.4% Multiracial, 4.7% Hispanic, 1.9% Native American/Other, and 0.0% Asian. This demographic dot map shows the population of Williamston, with one dot drawn for each person counted by the Census, color-coded by race.

Williamston has become slightly less racially diverse since the 2020 Census. It is considerably less 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 Williamston, that probability was 38.5% in 2020 and 37.5% in the most recent ACS estimates.

Williamston is ranked the 117th most populous place in South Carolina, out of 475 places. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs). Williamston was ranked the 117th most populous place in the 2020 Census.

Williamston's White Population

3,258 residents of Williamston, or 78.1% of the population, identify as White. The share of White residents in Williamston is significantly higher than in South Carolina overall, where 61.9% of the population is White. Williamston ranks 113th statewide in terms of White residents as a share of the population, out of 475 places.

Since the 2020 Census, Williamston's White population has grown by an estimated 4.5%. White residents' share of Williamston's population has increased from 77.1% to 78.1%.

Williamston is less White than neighboring West Pelzer (85.9% White), Pelzer (84.9% White), Piedmont (78.7% White), Ware Place (85.5% White), and Belton (82.8% White).

Williamston's Black Population

373 residents of Williamston, or 8.9% of the population, identify as Black. The share of Black residents in Williamston is significantly lower than in South Carolina overall, where 24.6% of the population is Black. Williamston ranks 336th statewide in terms of Black residents as a share of the population, out of 475 places.

Since the 2020 Census, Williamston's Black population has declined by an estimated 27.9%. Black residents' share of Williamston's population has decreased from 12.8% to 8.9%.

Williamston is more Black than neighboring West Pelzer (3% Black), Pelzer (1.6% Black), and Belton (8.3% Black). Williamston is less Black than neighboring Piedmont (14.3% Black), and Ware Place (14.5% Black).

Williamston's Asian Population

0 residents of Williamston, or 0.0% of the population, identify as Asian. The share of Asian residents in Williamston is comparable to the share in South Carolina overall, where 1.7% of the population is Asian. Williamston ranks 342nd statewide in terms of Asian residents as a share of the population, out of 475 places.

Since the 2020 Census, Williamston's Asian population has declined by an estimated 100.0%. Asian residents' share of Williamston's population has remained roughly unchanged at 0.0%.

Williamston is less Asian than neighboring Pelzer (0.7% Asian), Piedmont (0.6% Asian), and Belton (0.2% Asian).

Williamston's Hispanic Population

195 residents of Williamston, or 4.7% of the population, identify as Hispanic. The share of Hispanic residents in Williamston is slightly lower than in South Carolina overall, where 7.4% of the population is Hispanic. Williamston ranks 156th statewide in terms of Hispanic residents as a share of the population, out of 475 places.

Since the 2020 Census, Williamston's Hispanic population has declined by an estimated 16.7%. Hispanic residents' share of Williamston's population has decreased from 5.8% to 4.7%.

Williamston is more Hispanic than neighboring Piedmont (1.7% Hispanic), Ware Place (0% Hispanic), and Belton (1.6% Hispanic). Williamston is less Hispanic than neighboring West Pelzer (6.4% Hispanic), and Pelzer (8% Hispanic).

Williamston's Native American/Other Population

78 residents of Williamston, or 1.9% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Williamston is comparable to the share in South Carolina overall, where 0.7% of the population is Native American/Other. Williamston ranks 274th statewide in terms of Native American/Other residents as a share of the population, out of 475 places.

Since the 2020 Census, Williamston's Native American/Other population has grown by an estimated 225.0%. Native American/Other residents' share of Williamston's population has increased from 0.6% to 1.9%.

Williamston is more Native American/Other than neighboring West Pelzer (0% Native American/Other), Pelzer (0% Native American/Other), Piedmont (0.1% Native American/Other), Ware Place (0% Native American/Other), and Belton (0% Native American/Other).

Williamston's Multiracial Population

266 residents of Williamston, or 6.4% of the population, identify as Multiracial. The share of Multiracial residents in Williamston is slightly higher than in South Carolina overall, where 3.7% of the population is Multiracial. Williamston ranks 222nd statewide in terms of Multiracial residents as a share of the population, out of 475 places.

Since the 2020 Census, Williamston's Multiracial population has grown by an estimated 83.4%. Multiracial residents' share of Williamston's population has increased from 3.6% to 6.4%.

Williamston is more Multiracial than neighboring West Pelzer (4.7% Multiracial), Pelzer (4.8% Multiracial), Piedmont (4.6% Multiracial), and Ware Place (0% Multiracial). Williamston is less Multiracial than neighboring Belton (7% 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.