Duncan, SC Demographics

A map of Duncan's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	2,326	2,098	54.0%	51.9%
Black	1,407	1,235	32.6%	30.6%
Hispanic	443	436	10.3%	10.8%
Native American/Other	68	26	1.6%	0.6%
Multiracial	66	188	1.5%	4.7%
Asian	0	58	0.0%	1.4%

Duncan, South Carolina has an estimated population of 4,310, an increase from the 4,041 recorded in the 2020 Census. The population is 54.0% White, 32.6% Black, 10.3% Hispanic, 1.6% Native American/Other, 1.5% Multiracial, and 0.0% Asian. This demographic dot map shows the population of Duncan, with one dot drawn for each person counted by the Census, color-coded by race.

Duncan has become less racially diverse since 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 Duncan, that probability was 62.3% in 2020 and 59.1% in the most recent ACS estimates.

Duncan is ranked the 113th 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). Duncan was ranked the 118th most populous place in the 2020 Census.

Duncan's White Population

2,326 residents of Duncan, or 54.0% of the population, identify as White. The share of White residents in Duncan is lower than in South Carolina overall, where 61.9% of the population is White. Duncan ranks 291st statewide in terms of White residents as a share of the population, out of 475 places.

Since the 2020 Census, Duncan's White population has grown by an estimated 10.9%. White residents' share of Duncan's population has increased from 51.9% to 54.0%.

Duncan is more White than neighboring Wellford (42.6% White). Duncan is less White than neighboring Lyman (59.2% White), Startex (96% White), Reidville (69.8% White), and Greer (57.9% White).

Duncan's Black Population

1,407 residents of Duncan, or 32.6% of the population, identify as Black. The share of Black residents in Duncan is higher than in South Carolina overall, where 24.6% of the population is Black. Duncan ranks 206th statewide in terms of Black residents as a share of the population, out of 475 places.

Since the 2020 Census, Duncan's Black population has grown by an estimated 13.9%. Black residents' share of Duncan's population has increased from 30.6% to 32.6%.

Duncan is more Black than neighboring Lyman (21.8% Black), Startex (0% Black), Reidville (20.2% Black), and Greer (17.4% Black). Duncan is less Black than neighboring Wellford (38.6% Black).

Duncan's Asian Population

0 residents of Duncan, or 0.0% of the population, identify as Asian. The share of Asian residents in Duncan is comparable to the share in South Carolina overall, where 1.7% of the population is Asian. Duncan ranks 105th statewide in terms of Asian residents as a share of the population, out of 475 places.

Since the 2020 Census, Duncan's Asian population has declined by an estimated 100.0%. Asian residents' share of Duncan's population has decreased from 1.4% to 0.0%.

Duncan is less Asian than neighboring Lyman (3.2% Asian), Wellford (3.1% Asian), Reidville (3% Asian), and Greer (5.2% Asian).

Duncan's Hispanic Population

443 residents of Duncan, or 10.3% of the population, identify as Hispanic. The share of Hispanic residents in Duncan is slightly higher than in South Carolina overall, where 7.4% of the population is Hispanic. Duncan ranks 66th statewide in terms of Hispanic residents as a share of the population, out of 475 places.

Since the 2020 Census, Duncan's Hispanic population has grown by an estimated 1.6%. Hispanic residents' share of Duncan's population has decreased from 10.8% to 10.3%.

Duncan is more Hispanic than neighboring Lyman (9.6% Hispanic), Startex (0% Hispanic), Wellford (6.4% Hispanic), and Reidville (4.7% Hispanic). Duncan is less Hispanic than neighboring Greer (16.1% Hispanic).

Duncan's Native American/Other Population

68 residents of Duncan, or 1.6% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Duncan is comparable to the share in South Carolina overall, where 0.7% of the population is Native American/Other. Duncan ranks 241st statewide in terms of Native American/Other residents as a share of the population, out of 475 places.

Since the 2020 Census, Duncan's Native American/Other population has grown by an estimated 161.5%. Native American/Other residents' share of Duncan's population has increased from 0.6% to 1.6%.

Duncan is more Native American/Other than neighboring Startex (0% Native American/Other), Reidville (0.5% Native American/Other), and Greer (0.3% Native American/Other). Duncan is less Native American/Other than neighboring Lyman (2.6% Native American/Other), and Wellford (2.2% Native American/Other).

Duncan's Multiracial Population

66 residents of Duncan, or 1.5% of the population, identify as Multiracial. The share of Multiracial residents in Duncan is slightly lower than in South Carolina overall, where 3.7% of the population is Multiracial. Duncan ranks 102nd statewide in terms of Multiracial residents as a share of the population, out of 475 places.

Since the 2020 Census, Duncan's Multiracial population has declined by an estimated 64.9%. Multiracial residents' share of Duncan's population has decreased from 4.7% to 1.5%.

Duncan is less Multiracial than neighboring Lyman (3.5% Multiracial), Startex (4% Multiracial), Wellford (7.2% Multiracial), Reidville (1.7% Multiracial), and Greer (3.2% 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.