Telegraph City was an unincorporated town in Calaveras County, California.

It lies at an elevation of 653 feet (199 m).

First named Grasshopper City when it was started in the early 1860s, it was renamed in the 1870s for its location on the telegraph line between Stockton and Sonora.

[2] The town had copper mining nearby, and was the location of a large sheep and cattle ranching operation.

[4][5][3] The site is now abandoned, though fieldstone walls and foundations remain.