Thomaston is an unincorporated community in southeastern DeWitt County, Texas, United States.

[1] Although Thomaston is unincorporated, it has a post office, with the ZIP code of 77989.

[3] Founded along the Gulf, Western Texas and Pacific Railroad in 1872, the community was named for Nathan Thomas, who had previously owned part of the land on which the community was built.

Thomaston has declined in recent decades as non-railroad transportation has become significant.

This article about a location in DeWitt County, Texas is a stub.