Adelanto is a city in San Bernardino County, California, United States. It is approximately 9 miles (14 km) northwest of Victorville in the Victor Valley area of the Mojave Desert, in the northern region of the Inland Empire. The population was 38,046 at the 2020 census.

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.