Allendale County Demographics

A map of Allendale County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
Black	5,081	5,646	66.3%	70.2%
White	1,748	1,985	22.8%	24.7%
Hispanic	585	194	7.6%	2.4%
Multiracial	153	138	2.0%	1.7%
Native American/Other	76	59	1.0%	0.7%
Asian	18	17	0.2%	0.2%

Allendale County, South Carolina has an estimated population of 7,661, a decrease from the 8,039 recorded in the 2020 Census. The population is 66.3% Black, 22.8% White, 7.6% Hispanic, 2.0% Multiracial, 1.0% Native American/Other, and 0.2% Asian. This demographic dot map shows the population of Allendale County, with one dot drawn for each person counted by the Census, color-coded by race.

Allendale has become considerably more racially diverse since the 2020 Census. It is 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 Allendale County, that probability was 44.5% in 2020 and 50.2% in the most recent ACS estimates.

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

Allendale County's White Population

1,748 residents of Allendale County, or 22.8% of the population, identify as White. The share of White residents in Allendale County is significantly lower than in South Carolina overall, where 61.9% of the population is White. Allendale County ranks 46th statewide in terms of White residents as a share of the population, out of 46 counties.

Since the 2020 Census, Allendale County's White population has declined by an estimated 11.9%. White residents' share of Allendale County's population has decreased from 24.7% to 22.8%.

Allendale County is less White than neighboring Barnwell County (50.5% White), Hampton County (40.6% White), Screven County (55.1% White), Bamberg County (37% White), and Effingham County (72.9% White).

Allendale County's Black Population

5,081 residents of Allendale County, or 66.3% of the population, identify as Black. The share of Black residents in Allendale County is significantly higher than in South Carolina overall, where 24.6% of the population is Black. Allendale County ranks 1st statewide in terms of Black residents as a share of the population, out of 46 counties.

Since the 2020 Census, Allendale County's Black population has declined by an estimated 10.0%. Black residents' share of Allendale County's population has decreased from 70.2% to 66.3%.

Allendale County is more Black than neighboring Barnwell County (42.8% Black), Hampton County (51.9% Black), Screven County (39% Black), Bamberg County (59.4% Black), and Effingham County (14.4% Black).

Allendale County's Asian Population

18 residents of Allendale County, or 0.2% of the population, identify as Asian. The share of Asian residents in Allendale County is comparable to the share in South Carolina overall, where 1.7% of the population is Asian. Allendale County ranks 43rd statewide in terms of Asian residents as a share of the population, out of 46 counties.

Since the 2020 Census, Allendale County's Asian population has grown by an estimated 5.9%. Asian residents' share of Allendale County's population has remained roughly unchanged at 0.2%.

Allendale County is more Asian than neighboring Screven County (0% Asian). Allendale County is less Asian than neighboring Barnwell County (0.6% Asian), Hampton County (1% Asian), Bamberg County (0.5% Asian), and Effingham County (1% Asian).

Allendale County's Hispanic Population

585 residents of Allendale County, or 7.6% of the population, identify as Hispanic. The share of Hispanic residents in Allendale County is comparable to the share in South Carolina overall, where 7.4% of the population is Hispanic. Allendale County ranks 36th statewide in terms of Hispanic residents as a share of the population, out of 46 counties.

Since the 2020 Census, Allendale County's Hispanic population has grown by an estimated 201.5%. Hispanic residents' share of Allendale County's population has increased from 2.4% to 7.6%.

Allendale County is more Hispanic than neighboring Barnwell County (2.9% Hispanic), Hampton County (4.1% Hispanic), Screven County (2.7% Hispanic), Bamberg County (1.4% Hispanic), and Effingham County (6.6% Hispanic).

Allendale County's Native American/Other Population

76 residents of Allendale County, or 1.0% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Allendale County is comparable to the share in South Carolina overall, where 0.7% of the population is Native American/Other. Allendale County ranks 13th statewide in terms of Native American/Other residents as a share of the population, out of 46 counties.

Since the 2020 Census, Allendale County's Native American/Other population has grown by an estimated 28.8%. Native American/Other residents' share of Allendale County's population has remained roughly unchanged at 1.0%.

Allendale County is more Native American/Other than neighboring Barnwell County (0.6% Native American/Other), Hampton County (0.7% Native American/Other), Screven County (0% Native American/Other), Bamberg County (0.4% Native American/Other), and Effingham County (0.7% Native American/Other).

Allendale County's Multiracial Population

153 residents of Allendale County, or 2.0% of the population, identify as Multiracial. The share of Multiracial residents in Allendale County is comparable to the share in South Carolina overall, where 3.7% of the population is Multiracial. Allendale County ranks 46th statewide in terms of Multiracial residents as a share of the population, out of 46 counties.

Since the 2020 Census, Allendale County's Multiracial population has grown by an estimated 10.9%. Multiracial residents' share of Allendale County's population has remained roughly unchanged at 2.0%.

Allendale County is more Multiracial than neighboring Hampton County (1.7% Multiracial), and Bamberg County (1.2% Multiracial). Allendale County is less Multiracial than neighboring Barnwell County (2.7% Multiracial), Screven County (3.1% Multiracial), and Effingham County (4.5% 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.