South Plains is an unincorporated community in northern Floyd County, Texas, United States.

[1] Although South Plains is unincorporated, it has a post office, with the ZIP code of 79258.

[3] Quitaque Creek flows past just north of the community and creates a gorge in the Caprock escarpment about three miles to the east.

[2] A post office was established at South Plains in 1909, several miles from the current location; it was moved twice before reaching the current location in 1927, along the Fort Worth and Denver Railway.

The community flourished in the 1920s, with a school and businesses being established, but the coming of the Great Depression led to a decline of population.