Buellton is a small city in Santa Barbara County, California, United States. The city of Buellton is one of the communities that make up the Santa Ynez Valley. The population was 4,828 at the 2010 census. Buellton is located at 343651N1201138W / 34.61417N 120.19389W / 34.61417; -120.19389 (34.614136, -120.193798). at an elevation of 358 ft (109 m).