Peaster is an unincorporated community in Parker County, Texas, United States, nine miles (14 km) northwest of Weatherford.

The community that developed near the site of his home was originally called Freemont; in 1885 the name was changed to Peasterville.

During the mid-1920s the town's population grew to approximately 300, but this was soon followed by a steep decline after the Great Depression.

Peaster High School has many sports, which include: Basketball, Baseball, Football, Golf, Tennis, Track and Field, Softball, Volleyball, and Cross-country.

Peaster is the birthplace of writer Robert E. Howard, creator of the character Conan the Barbarian.