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County Overview

With a land area of 1,057 square miles and 38,604 population in 2021, the population density in the county is approximately 37 people per square mile. The county is located in the southwestern region of South Carolina, on the Atlantic Ocean. It is bordered by Bamberg and Orangeburg Counties, South Carolina to the north, Allendale and Hampton Counties, South Carolina to the west, the Atlantic Ocean and Beaufort County, South Carolina to the south, Charleston County, South Carolina to the east, and Dorchester County, South Carolina to the northeast. Most of land is on a low coastal plain, with a significant portion of its area consisting of tidal marshes and swamps.

Colleton County’s climate is humid and subtropical. The summers are hot and oppressive while the winters are short and cold.  It is wet and partly cloudy year-round. The average annual rainfall is approximately 47 inches with 96 days per year. Over the course of the year, the temperature typically varies from 38°F to 91°F and is rarely below 26°F or above 97°F.

There are six municipalities within Colleton County including the City of Walterboro and the Towns of Cottageville, Edisto Beach, Lodge, Smoaks, and Williams.