Spartanburg Day School is a private, nonsectarian, college preparatory school located in unincorporated Spartanburg County, South Carolina, United States, with a Spartanburg post office address, in the Greenville-Spartanburg area. It consists of a lower school for 2K-4th graders, a middle school for 5th–8th graders, and an upper school for 9th–12th graders.