Tuolumne County, California

county in California, United States
Flag of Tuolumne County, California.png
Seal of Tuolumne County, California.png

Tuolumne County (/tuˈɒləmi/), officially the County of Tuolumne, is a county in the U.S. state of California. As of the 2010 census, the population was 54,179.[1] The county seat and only incorporated city is Sonora.[2] The county is in the Sierra Nevada region.

The northern half of Yosemite National Park is in the eastern part of this county.

Tuolumne County was founded in 1850.


  1. "State & County QuickFacts". United States Census Bureau. Retrieved April 6, 2016.
  2. "Find a County". National Association of Counties. Retrieved 2011-06-07.