Tuolumne County, California

38°01′N 119°56′W / 38.02°N 119.94°W / 38.02; -119.94

Tuolumne County, California
County
County of Tuolumne
Images, from top down, left to right: the Old Tuolumne County Courthouse in Sonora, a shop in Columbia State Historic Park, Tuolumne Meadows in Yosemite National Park
Flag Seal
Interactive map of Tuolumne County
Location in the state of California
Country	United States
State	California
Regions	Sierra Nevada, Gold Country
Incorporated	February 15, 1850[1]
County seat	Sonora
Largest city	Sonora
Government
• Type	Council–Administrator
• Body	Board of Supervisors
• Chair	Kathleen Haff
• Vice Chair	David Goldemberg
• Board of Supervisors[3]	Supervisors David Goldemberg Ryan Campbell Daniel Anaiah Kirk Kathleen Haff Jaron Brandon
• County Administrator	Tracie Riggs[2]
Area
• Total	2,274 sq mi (5,890 km2)
• Land	2,221 sq mi (5,750 km2)
• Water	54 sq mi (140 km2)
Highest elevation	13,114 ft (3,997 m)
Population  (April 1, 2020)[4]
• Total	55,620
• Density	24/sq mi (9.4/km2)
Time zone	UTC−8 (Pacific Time Zone)
• Summer (DST)	UTC−7 (Pacific Daylight Time)
Congressional district	5th
Website	tuolumnecounty.ca.gov

Tuolumne County (/tuˈɒləmi/ ^ⓘ), officially the County of Tuolumne, is a county located in the U.S. state of California. As of the 2020 census, the population was 55,620.^[6] The county seat and only incorporated city is Sonora.^[7]

Tuolumne County comprises the Sonora, CA Micropolitan Statistical Area. The county is in the Sierra Nevada region.

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