Alamorio (from Spanish Álamo and Río meaning "poplar tree" and "river") is an unincorporated community in Imperial County, California. It is located , north-northwest of Holtville, at an elevation of 128 feet (40 m) below sea level. The community resides along the Alamo River and California State Route 78. A post office operated at Alamorio from 1909 to 1917. References Unincorporated communities in Imperial County, California El Centro metropolitan area Imperial Valley Unincorporated communities in California