Twain Harte is a census-designated place (CDP) in Tuolumne County, California, United States. The population was 2,226 at the 2010 census, down from 2,586 at the 2000 census. Its name is derived from the last names of two famous authors who lived in California, Mark Twain and Bret Harte.
Twain Harte is located at 38°2′25″N 120°14′1″W (38.040390, -120.233671).
Twain Harte is situated in Tuolumne County along Highway 108 at an elevation of 3,640 feet (1,110 m).
The USPS zip code for Twain Harte is 95383.
According to the United States Census Bureau, the CDP has a total area of 3.7 square miles (9.6 km2), of which, 99.49% is land and 0.51% is water. Its municipal water supply comes from the nearby Lyons Reservoir in the Stanislaus National Forest.
Twain Harte is both a summer and winter vacation community situated at the transition zone between the oak forest of the California foothills and the mixed pine and fir forest of the Sierra Nevada. Summers are warm during the day and the nights are generally mild; making Twain Harte a pleasant escape from the long, hot summers of the California Central Valley. Winters can be very cool with snow occurring several times during the season.