South Carolina Counties by Population (2026)

There are 46 counties in South Carolina.

Greenville County is the largest county in the state, with a population of 592,843. The most recent census shows that its population has increased by 0.12% since the previous census.

A number of other South Carolina counties also boast relatively large populations for their state, though not able to match the density of Greenville County:

• Horry County : 443,425
• Richland County : 441,481

South Carolina Counties with the Fewest Residents

The smallest county in South Carolina is Allendale County , with a population of just 7,461. This total represents a decrease of 0.1% since the last census count was performed.

Other small counties include:

• McCormick County : 10,377
• Bamberg County : 12,628
• Calhoun County : 14,331

South Carolina Counties with Rapid Growth

Jasper County , with its current population of 39,570, has shown the largest population growth, with an increase of 0.4% since the last census.

Greenville County has also had relatively high population growth of 0.12% with 592,843 residents.

On the other hand, Allendale County has had the largest decrease in population, with its 7,461 current residents totalling 0.1% less than the previous census.