Chester, county, northern South Carolina, U.S. It is situated between the Broad and Catawba rivers in a hilly piedmont region of pine and hardwood forests. Chester and Landsford Canal state parks lie within its borders, as does part of Sumter National Forest.

In 2019, Chester County, SC had a population of 32.3k people with a median age of 42 and a median household income of $42,442. Between 2018 and 2019 the population of Chester County, SC declined from 32,326 to 32,311, a −0.0464% decrease and its median household income grew from $40,080 to $42,442, a 5.89% increase.

99.6% of the residents in Chester County, SC are U.S. citizens.

In 2019, the median property value in Chester County, SC was $95,600, and the homeownership rate was 76.1%. Most people in Chester County, SC drove alone to work, and the average commute time was 27 minutes. The average car ownership in Chester County, SC was 2 cars per household.

Chester County, SC borders Fairfield County, SC, Lancaster County, SC, Union County, SC, and York County, SC.