Langley is a census-designated place (CDP) in Aiken County, South Carolina, United States.

The name was chosen in honor of William C. Langley of Brooklyn, New York, the company's principal stockholder.

According to Who Was Who in America, William C. Langley was a shrewd and astute 19th-century businessman who amassed a fortune in the textile industry.

0.35% of the population were of American Indian or Alaska Native, 0.28% were Asian, 4.77% were African American, 0.07% were Native Hawaiian or other Pacific Islander, 91.91% were white, 0.83% were some other race, and 1.80% were of two or more races.

Persons of Hispanic or Latino origin (of any race) comprised 2.56% of the population.