Fairfax is a town in Allendale and Hampton counties, South Carolina, United States. The population was 2,025 at the 2010 census, a decline of over one-third of its population of 3,206 from 2000.
The Virginia Durant Young House was added to the National Register of Historic Places in 1983.
Fairfax is located at 32°57′27″N 81°14′16″W (32.957633, -81.237794).
According to the United States Census Bureau, the town has a total area of 3.3 square miles (8.5 km2), all land.
As of the census of 2000, there were 3,206 people, 845 households, and 549 families residing in the town. The population density was 965.8 people per square mile (372.8/km2). There were 948 housing units at an average density of 285.6 per square mile (110.2/km2). The racial makeup of the town was 25.73% White, 73.46% African American, 0.12% Native American, 0.12% Asian, 0.37% from other races, and 0.19% from two or more races. Hispanic or Latino of any race were 0.34% of the population.
There were 845 households, out of which 29.8% had children under the age of 18 living with them, 30.1% were married couples living together, 29.5% had a female householder with no husband present, and 35.0% were non-families. 32.9% of all households were made up of individuals, and 14.7% had someone living alone who was 65 years of age or older. The average household size was 2.46 and the average family size was 3.13.