Sylvester is an unincorporated community in Fisher County, Texas, United States.
They bought part of the AJ Ranch in anticipation of the arrival of the Kansas, Mexico and Orient Railway and named it in honor of W.W. Sylvester, the railroad's promotion manager.
Although Sylvester is unincorporated, it continues to have a post office in operation, with the zip code of 79560.
During the 1960s and 1970s, the U.S. Post Office was managed by Postmaster Mrs. Buford (Ruth Brown), who retired in the late 1970s.
To date, the only non-agricultural business in the community is the Sylvester McCaulley Water Supply managed by Randy Kelly.