The Marine Corps Air Ground Combat Center (MCAGCC), also known as 29 Palms, is a United States Marine Corps base. It was a census-designated place (CDP) officially known as Twentynine Palms Base located adjacent to the city of Twentynine Palms in southern San Bernardino County, California. As of the 2000 census, the base had a total population of 8,413. The zip code of the base is 92278.