Volcano is a census-designated place in Amador County,California. It lies at an elevation of 2070 feet (631 m). The population was 115 at the 2010 census.
The town is named for its setting in a bowl-shaped valley which early miners thought was caused by a volcano.The area was first known designated by Colonel Stevenson's men, who mined Soldiers Gulch in 1849.Hydraulic mining operations, begun in 1855, brought thousands of fortune seekers to form a town of 17 hotels, a library, a theater, and courts of quick justice.During the Civil War, Volcano's gold served the Union. The Volcano Blues smuggled the cannon "Old Abe," into the town by hearse, to intimidate rebel sympathizers. The cannon was cast by Cyrus Alger & Co. in Boston in 1837 and is the first of two 6-pounders made on the same day to be stamped with serial number 4. Abe is the only cannon of that age in the U.S. still on a nineteenth century wooden carriage, and has had an interesting history all on its own.The landmark St. George Hotel is listed on the National Register of Historic Places.