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Mill Valley

Ghost town · Calaveras County, California

Mill Valley is a ghost town in Calaveras County, California, recorded as human settlement in United States of America. It is one of 6 former communities in Calaveras County on the federal names register. That ranks the county 47th among the 58 California counties with a vanished settlement on record.

The U.S. Geological Survey lists Mill Valley as a historical populated place: the name is no longer in official use for a community, whether the settlement was abandoned, absorbed into a neighbouring town or renamed.

Key facts

Questions

Where is Mill Valley?

Mill Valley is in Calaveras County, California.

How many ghost towns are in Calaveras County?

Calaveras County, California has 6 ghost towns on record at Wayfarrow.

Sources and licences

Facts marked "approximately" carry an uncertain date in the source. Text on this page is generated from the sources above; no encyclopedia prose is copied. Last updated 2026-11-05.