Richland, county, central South Carolina, U.S. It is bordered to the east by the Wateree River and to the west by the Broad River, which, after its confluence with the Saluda, becomes the Congaree River. The northern portion of the county lies in Fall Line hills, whereas the southern part consists of flat Coastal Plain terrain with large areas of swampland. Much of the county is wooded in pines and hardwoods. Congaree Swamp National Monument is located there, as are Harbison State Forest, Sesquicentennial State Park, McEntire Air National Guard Base, and Fort Jackson, an army training base.

In 2019, Richland County, SC had a population of 416k people with a median age of 33.8 and a median household income of $52,293. Between 2018 and 2019 the population of Richland County, SC grew from 414,576 to 415,759, a 0.285% increase and its median household income grew from $52,159 to $52,293, a 0.257% increase.

96.4% of the residents in Richland County, SC are U.S. citizens.

The largest universities in Richland County, SC are University of South Carolina-Columbia (9,950 degrees awarded in 2019), Columbia College (217934) (543 degrees), and Columbia International University (428 degrees).

In 2019, the median property value in Richland County, SC was $176,200, and the homeownership rate was 59.2%. Most people in Richland County, SC drove alone to work, and the average commute time was 22.5 minutes. The average car ownership in Richland County, SC was 2 cars per household.

Richland County, SC borders Calhoun County, SC, Fairfield County, SC, Kershaw County, SC, Lexington County, SC, Newberry County, SC, and Sumter County, SC.