Omo Ranch is an unincorporated community in El Dorado County, California. It is located 12.5 mi south-southeast of Camino, at an elevation of 3612 feet (1101 m). Omo Ranch was once a logging town with a sawmill; the mill closed in 1973. Today, Omo Ranch is a rural residential area with few county services. Its population in 1986 was estimated at 150. A post office operated at Omo Ranch from 1888 to 1974. The name Omo comes from a Native American village.