Aukum is an unincorporated community in El Dorado County, California. It is located 1mi northeast of River Pines, 1.2mi south of Mount Aukum and 8.5mi northeast of Plymouth, at an elevation of 2155 feet. The ZIP code is 95656.The Aukum post office operated from 1895 to 1914 and 1920 to 1961, when it was changed to Mount Aukum.