Manton is a census-designated place partially in Tehama County, California, United States. It is also in Shasta County. The population in the Tehama County portion was 347 at the 2010 census, down from 372 at the 2000 census.In August 2005, the town was overrun by a forest fire which destroyed several homes and forced the evacuation of the entire town. There were no injuries.The town is also the home, as of June 2006, of the St. John of San Francisco Monastery, an Orthodox Christian men's monastery belonging to the Diocese of the West of the Orthodox Church in America.