In 2020, Barnwell County, SC had a population of 21.2k people with a median age of 41.6 and a median household income of $37,572. Between 2019 and 2020 the population of Barnwell County, SC declined from 21,346 to 21,170, a −0.825% decrease and its median household income grew from $35,803 to $37,572, a 4.94% increase.
The 5 largest ethnic groups in Barnwell County, SC are White (Non-Hispanic) (50.6%), Black or African American (Non-Hispanic) (44.5%), Two+ (Non-Hispanic) (1.48%), White (Hispanic) (1.12%), and Black or African American (Hispanic) (0.666%).
None of the households in Barnwell County, SC reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
98.6% of the residents in Barnwell County, SC are U.S. citizens.
In 2020, the median property value in Barnwell County, SC was $87,600, and the homeownership rate was 72.5%. Most people in Barnwell County, SC drove alone to work, and the average commute time was 30.9 minutes. The average car ownership in Barnwell County, SC was 2 cars per household.