Marion County, SC Population

Overview

29,585

Total Population

41.2

Median age

54.31%

Female population %

84.1:100

Gender ratio (M:F)

55-59 years

Largest age group

63.6

Total dependency ratio

Black or African American

Largest racial group

881

Hispanic population

Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

TABLE OF CONTENTS

Age

Marion County's population is old compared to the rest of the country:

The median age in Marion County is 41.2, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Marion County's population under 18 was 22.85%, compared to the 22.51% nationwide.
Marion County's elderly or the senior population (over 65 age) was 19.91% as compared to 16.04% nationwide.
Of the total population in Marion County, 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.

There are 2,549 more females than males in Marion County:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 54.31% females and 45.69% males in Marion County, SC.
The Marion County, SC gender ratio is 84.1:100 i.e. 84.1 men to 100 women (0.841).
For male population, the largest age group is 35-39 years with a population of 1,143.
For the female population, the largest age group is 55-59 years with a population of 1,273.

Marion County's population has become increasingly diverse:

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.
Marion County's racial breakdown clearly shows that there is an absolute majority of Black or African American population in the county.
By ethnicity, 881 is Hispanic or Latino (of any race), and 28,704 (97.02% of the total population) is Non-Hispanic.
The largest racial group in Marion County is Black or African American with a population of 16,832 (56.89% of the total population).

Marion County's population has already reached its peak and is showing a trend of decline:

The peak population was 35,460 in the year 2000
From 2000 to 2010, Marion County's population decreased by 2,509 (7.08%), as compared to the national growth of 9.63%.
From 2010 to 2020, Marion County's population decreased by 3,868 (11.74%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
Between the year 2000 and 2022, Marion County's population was lowest in year 2022 at 28,450.