Madera County, officially the County of Madera, is a county located at the geographic center of the U.S. state of California. It features a varied landscape, encompassing the eastern San Joaquin Valley and the central Sierra Nevada, with Madera serving as the county seat. Established in 1893 from part of Fresno County, Madera County reported a populati…Madera County, officially the County of Madera, is a county located at the geographic center of the U.S. state of California. It features a varied landscape, encompassing the eastern San Joaquin Valley and the central Sierra Nevada, with Madera serving as the county seat. Established in 1893 from part of Fresno County, Madera County reported a population of 156,255 in the 2020 census.