Fresno is a city located in the San Joaquin Valley of California, United States. It serves as the county seat of Fresno County and stands as the largest city in the greater Central Valley region. Situated near the geographic center of California, it functions as a significant economic hub for the surrounding area. The city covers approximately 114.7 square miles and is positioned strategically between major urban centers and national parks.

Named for the abundant ash trees lining the San Joaquin River, Fresno was founded in 1872 as a railway station of the Central Pacific Railroad. It was incorporated as a city in 1885 after residents moved from Millerton following devastating floods. The community evolved from a small station into a major urban center, with its administrative role solidified when it replaced Millerton as the county seat. Early development was driven by irrigation systems and agricultural production.

The city features diverse districts such as Sunnyside and historic neighborhoods that once included Little Armenia and Chinatown. Notable sites include the Fresno Municipal Sanitary Landfill, a National Historic Landmark, and the Save Mart Center at California State University, Fresno. The urban landscape reflects a transition from row crops to development, with landmarks like Chukchansi Park and the William Saroyan theater defining its cultural geography.

Fresno attracts visitors as a gateway to Yosemite, Kings Canyon, and Sequoia National Parks. It is known for its large Hmong community and as the birthplace of the dance style popping. The city offers educational innovation history and hosts high-profile concerts at local venues. Its character is shaped by its role in fintech history and its status as a leader in agricultural production within the metropolitan region.

The population was 542,107 as of the 2020 census, making it the fifth-most populous city in California. The economy is tied to large-scale agriculture and tourism, with Fresno Yosemite International Airport providing year-round commercial service. Summers are hot and dry, while winters feature mild temperatures and sparse rain. The city remains a key transit point for travelers heading to the Sierra Nevada recreation areas.