High Quality Content by WIKIPEDIA articles! Yucca Valley is an incorporated town located in San Bernardino County, California, United States. The population was 20,700 at the 2010 census, up from 16,865 at the 2000 census. Yucca Valley lies 17 miles (27 km) west of Twentynine Palms, 37 miles (60 km) north of Palm Springs, 89 miles (143 km) south of Barstow via State Route 247, 45 miles (72 km) southeast of Lucerne Valley and 55 miles (89 km) east of San Bernardino.