Tulare County is a county in the U.S. state of California. As of the 2010 census, the population was 442,179. Its county seat is Visalia. The county is named for Tulare Lake, once the largest freshwater lake west of the Great Lakes. Drained for agricultural development, the site is now in Kings County, which was created in 1893 from the western portion of the formerly larger Tulare County. Tulare County comprises the Visalia-Porterville, CA Metropolitan Statistical Area. The county is located in the Central Valley, south of Fresno. Sequoia National Park is located in the county, as are part of Kings Canyon National Park, in its northeast corner (shared with Fresno County), and part of Mount Whitney, on its eastern border (shared with Inyo County). As of the 2010 census, the population was 442,179, up from 368,021 at the 2000 census.