Marion County, SC Demographics

The total population of Marion County is estimated to be 29,212 with 13,603 males (46.57%) and 15,609 females (53.43%). There are 2,006 more females than males in Marion County.
The median household income in Marion County was $37,254 in 2021, which marked an an increase of 2,363(6.77%) from $34,891 in 2020. This income is 49.93% of the U.S. median household income of $74,606 (all incomes in 2022 inflation-adjusted dollars).
Per the latest American Community Survey by the Census Bureau, Marion County sees its highest median household income among householders in the age group of 25 to 44 years old, at $43,546. Overall, the median household income for the county of Marion County stands at $37,254.
In Marion County, the median income for all workers aged 15 years and older, regardless of work hours, was $27,616 for males and $20,147 for females. However, when specifically considering full-time, year-round workers within the same age group, the median income was $45,814 for males and $36,832 for females.
In Marion County, the demographic landscape is diverse, spanning 4 distinct racial categories among households. Among these, Some Other Race households have the highest median household income at $47,074, while Two or More Races households represent the opposite end with the lowest median household income of $31,005.
In 2022, the population of Marion County was 28,450, a 1.35% decrease year-by-year from 2021. Previously, in 2021, Marion County's population was 28,839, a decline of 0.84% compared to a population of 29,083 in 2020.
The median age in Marion County, SC is 41.2, as per 2021 ACS 5-Year Estimates. Of the total population, 18.97% were under the age of 15, 17.72% aged 15 to 29, 43.41% aged 30 to 64, 18.39% aged 65 to 84, and 1.52% were 85 years of age and older.
Racial distribution of Marion County population: 38.69% are White, 56.89% are Black or African American, 0.69% are American Indian and Alaska Native, 0.29% are Asian, 2.15% are some other race and 1.28% are multiracial.