Yermo is a town in the Mojave Desert in San Bernardino County, California. Its name is derived from the Spanish word for "wilderness". It is 13 miles east of Barstow on Interstate 15, just south of the Calico Mountains. In 2009, the town's population was an estimated 1,750.
Yermo is governed by an elected five-member board of directors comprising the Community Services District authorized by the County of San Bernardino. The board, which meets monthly, oversees the town's volunteer fire department, the Yermo/Calico VFD, as well as its street lighting, parks and water system. Yermo's ZIP Code is 92398, and the community is in telephone area code 760. Its USPS branch provides post office boxes to local residents and businesses; there is no letter-carrier service.
Yermo hosts the storage and industrial annex of the Marine Corps Logistics Base Barstow.