Seneca, SC Demographics

A map of Seneca's Population by Race

Seneca, South Carolina has an estimated population of 8,993, a slight increase from the 8,850 recorded in the 2020 Census. The population is 72.8% White, 17.4% Black, 6.4% Hispanic, 1.8% Multiracial, 0.8% Asian, and 0.8% Native American/Other. This demographic dot map shows the population of Seneca, with one dot drawn for each person counted by the Census, color-coded by race.

Seneca has become considerably 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 Seneca, that probability was 54.1% in 2020 and 43.5% in the most recent ACS estimates.

Seneca is ranked the 68th 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). Seneca was ranked the 66th most populous place in the 2020 Census.

Seneca's White Population

6,551 residents of Seneca, or 72.8% of the population, identify as White. The share of White residents in Seneca is considerably higher than in South Carolina overall, where 61.9% of the population is White. Seneca ranks 228th statewide in terms of White residents as a share of the population, out of 475 places.

Since the 2020 Census, Seneca's White population has grown by an estimated 17.9%. White residents' share of Seneca's population has increased from 62.8% to 72.8%.

Seneca is more White than neighboring Utica (52.1% White), Newry (62.1% White), and West Union (60.3% White). Seneca is less White than neighboring Clemson University (83% White), and Westminster (84.3% White).

Seneca's Black Population

1,563 residents of Seneca, or 17.4% of the population, identify as Black. The share of Black residents in Seneca is lower than in South Carolina overall, where 24.6% of the population is Black. Seneca ranks 237th statewide in terms of Black residents as a share of the population, out of 475 places.

Since the 2020 Census, Seneca's Black population has declined by an estimated 27.1%. Black residents' share of Seneca's population has decreased from 24.2% to 17.4%.

Seneca is more Black than neighboring Newry (0% Black), West Union (8.4% Black), Clemson University (9.4% Black), and Westminster (2.5% Black). Seneca is less Black than neighboring Utica (40.9% Black).

Seneca's Asian Population

72 residents of Seneca, or 0.8% of the population, identify as Asian. The share of Asian residents in Seneca is comparable to the share in South Carolina overall, where 1.7% of the population is Asian. Seneca ranks 120th statewide in terms of Asian residents as a share of the population, out of 475 places.

Since the 2020 Census, Seneca's Asian population has declined by an estimated 33.3%. Asian residents' share of Seneca's population has remained roughly unchanged at 0.8%.

Seneca is more Asian than neighboring Newry (0% Asian), West Union (0% Asian), and Westminster (0% Asian). Seneca is less Asian than neighboring Utica (0.9% Asian), and Clemson University (1.3% Asian).

Seneca's Hispanic Population

572 residents of Seneca, or 6.4% of the population, identify as Hispanic. The share of Hispanic residents in Seneca is comparable to the share in South Carolina overall, where 7.4% of the population is Hispanic. Seneca ranks 146th statewide in terms of Hispanic residents as a share of the population, out of 475 places.

Since the 2020 Census, Seneca's Hispanic population has grown by an estimated 7.7%. Hispanic residents' share of Seneca's population has remained roughly unchanged at 6.4%.

Seneca is more Hispanic than neighboring Utica (2.5% Hispanic), and Clemson University (4.3% Hispanic). Seneca is less Hispanic than neighboring Newry (26% Hispanic), West Union (25.4% Hispanic), and Westminster (6.5% Hispanic).

Seneca's Native American/Other Population

69 residents of Seneca, or 0.8% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Seneca is comparable to the share in South Carolina overall, where 0.7% of the population is Native American/Other. Seneca ranks 217th statewide in terms of Native American/Other residents as a share of the population, out of 475 places.

Since the 2020 Census, Seneca's Native American/Other population has grown by an estimated 11.3%. Native American/Other residents' share of Seneca's population has remained roughly unchanged at 0.8%.

Seneca is more Native American/Other than neighboring West Union (0% Native American/Other). Seneca is less Native American/Other than neighboring Utica (1.9% Native American/Other), Newry (11.9% Native American/Other), Clemson University (0.9% Native American/Other), and Westminster (0.9% Native American/Other).

Seneca's Multiracial Population

166 residents of Seneca, or 1.8% of the population, identify as Multiracial. The share of Multiracial residents in Seneca is comparable to the share in South Carolina overall, where 3.7% of the population is Multiracial. Seneca ranks 73rd statewide in terms of Multiracial residents as a share of the population, out of 475 places.

Since the 2020 Census, Seneca's Multiracial population has declined by an estimated 63.1%. Multiracial residents' share of Seneca's population has decreased from 5.1% to 1.8%.

Seneca is more Multiracial than neighboring Newry (0% Multiracial), and Clemson University (1.2% Multiracial). Seneca is less Multiracial than neighboring West Union (5.9% Multiracial), and Westminster (5.8% 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.