Marion County Demographics

A map of Marion County's Population by Race

Marion County, South Carolina had a population of 29,183 in 2020. It was 38.0% White, 56.0% Black, 0.4% Asian, 2.4% Hispanic, 0.5% Native American/Other, and 2.7% Multiracial. This map presents the population of Marion County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Marion County is the 31st most populous county of the 46 counties in South Carolina.

Marion County's White Population

11,080 residents of Marion County identify as White, or 38.0%. This makes the White share of the population of Marion County considerably less than the White share of the population of South Carolina (62.1% White). Of the 46 counties in South Carolina, Marion County is ranked #41 in terms of White residents as a share of the population.

Marion County is more White than neighboring Williamsburg County (32.2% White). Marion County is less White than neighboring Dillon County (45.9% White), Florence County (50.4% White), Horry County (75.7% White), and Marlboro County (39.6% White).

Marion County's Black Population

16,333 residents of Marion County identify as Black, or 56.0%. This makes the Black share of the population of Marion County considerably larger than the Black share of the population of South Carolina (24.8% Black). Of the 46 counties in South Carolina, Marion County is ranked #6 in terms of Black residents as a share of the population.

Marion County is more Black than neighboring Dillon County (44.9% Black), Florence County (41.5% Black), Horry County (11.2% Black), and Marlboro County (49.9% Black). Marion County is less Black than neighboring Williamsburg County (63.1% Black).

Marion County's Asian Population

128 residents of Marion County identify as Asian, or 0.4%. This makes the Asian share of the population of Marion County roughly similar to the Asian share of the population of South Carolina (1.7% Asian). Of the 46 counties in South Carolina, Marion County is ranked #34 in terms of Asian residents as a share of the population.

Marion County is more Asian than neighboring Dillon County (0.2% Asian). Marion County is less Asian than neighboring Florence County (1.7% Asian), Horry County (1.3% Asian), and Williamsburg County (0.5% Asian).

Marion County's Hispanic Population

710 residents of Marion County identify as Hispanic, or 2.4%. This makes the Hispanic share of the population of Marion County roughly similar to the Hispanic share of the population of South Carolina (6.9% Hispanic). Of the 46 counties in South Carolina, Marion County is ranked #35 in terms of Hispanic residents as a share of the population.

Marion County is more Hispanic than neighboring Williamsburg County (2% Hispanic), and Marlboro County (2.2% Hispanic). Marion County is less Hispanic than neighboring Dillon County (3% Hispanic), Florence County (3.1% Hispanic), and Horry County (6.9% Hispanic).

Marion County's Native American/Other Population

151 residents of Marion County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 0.5%. This makes the Native American/Other share of the population of Marion County roughly similar to the Native American/Other share of the population of South Carolina (0.8% Native American/Other). Of the 46 counties in South Carolina, Marion County is ranked #35 in terms of Native American/Other residents as a share of the population.

Marion County is less Native American/Other than neighboring Dillon County (2.4% Native American/Other), Horry County (0.8% Native American/Other), and Marlboro County (4.4% Native American/Other).

Marion County's Multiracial Population

781 residents of Marion County identify as Multiracial, or 2.7%. This makes the Multiracial share of the population of Marion County roughly similar to the Multiracial share of the population of South Carolina (3.7% Multiracial). Of the 46 counties in South Carolina, Marion County is ranked #34 in terms of Multiracial residents as a share of the population.

Marion County is more Multiracial than neighboring Williamsburg County (1.8% Multiracial). Marion County is less Multiracial than neighboring Dillon County (3.5% Multiracial), Florence County (2.8% Multiracial), Horry County (4% Multiracial), and Marlboro County (3.6% Multiracial).

Source: 2020 Census State Redistricting Data and Census TIGER/Line Shapefiles.