Pleasanton is located south of San Antonio
on US 281 and Hwy 97 on the Atascosa River in Atascosa County
, where it was established in 1858.
In 1966 the "Cowboy Homecoming" was begun in Pleasanton. Since many locals claimed the town was the birthplace of the cowboy, they decided to commemorate the tradition officially. The festival, which occurs annually in August, has cook-offs, fiddler contests, and carnivals in tribute to the cattle industry.
Other important industries of the area are peanuts and petroleum. The population of Pleasanton was 6,091 in 1980 and 8,042 in 1994.