South Carolina Counties by Population (2025)

The most populous counties in South Carolina are Greenville County with 558,036, Richland County at 425,138, Charleston County with 424,367, Horry County at 397,478, and Spartanburg County with 356,698. You can get the most current Census population data for all 46 South Carolina counties, sorted from the most populous counties in South Carolina to the least, according to the 2023 Population Estimates Program.

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