Leesville is an unincorporated community in Gonzales County, Texas, United States. According to the Handbook of Texas, the community had an estimated population 150 in 2000. Leesville is located at 29°24′25″N 97°44′42″W﻿ / ﻿29.40694°N 97.745°W﻿ / 29.40694; -97.745 (29.4069038, -97.7449990). It is situated along State Highway 80 in southwestern Gonzales County, approximately 26 miles west of Gonzales and 19 miles south of Luling. Although it is unincorporated, Cost has a post office with the zip code of 78122. Public education in the community of Leesville is provided by the Nixon-Smiley Consolidated Independent School District.