Yucca Valley is an incorporated town in San Bernardino County, California, United States. The population was 20,700 as of the 2010 census. Yucca Valley lies 17 miles west of Twentynine Palms, 37 miles north of Palm Springs, 89 miles south of Barstow via State Route 247, 45 miles southeast of Lucerne Valley and 55 miles east of San Bernardino.