Total Population in Barnwell County, SC
ACS 2024 5-Year Estimates
20,521
Rank #1,851/3,222 · #39 in SC
43th
Barnwell 20,521
SC 5,296,225 -99.6%
US 330M
Total Population Trend
Rankings →Percentile Rank Over Time
Year-over-Year Population Change
National Distribution
How Barnwell County's total population of 20,521 compares to all 3,222 U.S. counties. Values range from 33 to 9,808,667.
Distribution of Total Population Across All Counties
Ranking Context
Counties ranked closest to Barnwell County for total population.
Nearby Rankings
Full ranking →| #1,848 | Fairfield County, SC | 20,550 |
| #1,849 | Coahoma County, MS | 20,540 |
| #1,850 | Carroll County, IN | 20,535 |
| #1,851 | Barnwell County, SC | 20,521 |
| #1,852 | Carbon County, UT | 20,517 |
| #1,853 | Greene County, NC | 20,486 |
| #1,854 | Lincoln County, WY | 20,486 |
About Total Population
Barnwell County, South Carolina has a total population of 20,521, ranking #1,851 of 3,222 counties nationwide — 100.0% below the national value of 330M. Within South Carolina, it ranks #39 of 46. This places it in the 43th percentile nationally.
Total population count from the American Community Survey. Source: U.S. Census Bureau, American Community Survey 2024 5-Year Estimates. All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.