Yermo is an unincorporated community in the Mojave Desert in San Bernardino County, California. It is 13 miles (21 km) east of Barstow on Interstate 15, just south of the Calico Mountains. Its population was estimated at 1,750 in 2009.

Barstow is a city in San Bernardino County, California, in the Mojave Desert of Southern California. Located in the Inland Empire region of California, the population was 25,415 at the 2020 census. Barstow is an important crossroads for the Inland Empire and home to Marine Corps Logistics Base Barstow.