Arbuckle is a census-designated place (CDP) in Colusa County, California, United States. The population was 3,028 at the 2010 census, up from 2,332 at the 2000 census. Arbuckle is situated in the southerly portion of Colusa County, approximately 20 miles (32 km) southwest of the City of Colusa, the county seat. The town is characterized by single-family residences, multiple-family units, some mobile homes, and commercial activities. Land surrounding Arbuckle is mostly agriculture including cultivated annual crops, and both active and unmaintained orchards (primarily almond).