Dunnigan (formerly, Antelope) is a census-designated place in Yolo County, California on Interstate 5. The population was 1,416 at the 2010 census. Dunnigan`s ZIP code is 95937 and its area code 530. It lies at an elevation of 69 feet (21 m). ==History== The town of Dunnigan was founded as Antelope by two early settlers, J. S. Copp and Jolin Wils....