Morongo Valley is a census-designated place (CDP) on State Route 62 in San Bernardino County, California, United States. The population was 3,552 at the 2010 census, up from 1,929 at the 2000 census. The town is bordered by Yucca Valley, California.

San Bernardino County, officially the County of San Bernardino, is a county located in the southern portion of the U.S. state of California, and is located within the Inland Empire area. As of the 2020 U.S. Census, the population was 2,181,654, making it the fifth-most populous county in California and the 14th-most populous in the United States. The county seat is San Bernardino.