Vallecito ("Little Valley" in Spanish; formerly, Murphy's Old Diggings, Valacito, Vallicita, Vallicito) is a census-designated place (CDP) in Calaveras County, California, United States. The population was 427 at the 2000 census. The town is registered as California Historical Landmark #273. Nearby is Moaning Cavern, the largest cave chamber in California, which the Miwok Indians used as a burial ground.