Fullerton is a city in northern Orange County, California, about 25 miles southeast of downtown Los Angeles and 11 miles north-northwest of Santa Ana, the county seat, with the Pacific Ocean roughly 11 miles to the southwest. Its position at the northern edge of Orange County places it between the Los Angeles and Orange County job centers, giving it a practical commuter geography. The city is best known as the home of California State University, Fullerton, a 236-acre public university whose students, faculty, and cultural events are woven into the community. Downtown Fullerton, with its historic core of restaurants, shops, and entertainment, anchors the city's social life, and the Fullerton Museum Center showcases regional history and culture. With a population of roughly 140,000, Fullerton is a diverse, established city of tree-lined residential neighborhoods, midcentury tracts, and newer planned developments such as Amerige Heights. Public education spans the Fullerton School District for elementary students and the Fullerton Joint Union High School District for secondary schools, with several highly regarded campuses including Sunny Hills High School. The Fullerton Transportation Center is a significant regional rail hub served by Metrolink commuter lines and Amtrak intercity trains, linking the city to Los Angeles, San Diego, and beyond. The city's parks, sports fields, and trails — including the Fullerton Arboretum on the university campus — round out an active lifestyle. Fullerton's roots reach back to the region's railroad and citrus era, and its older neighborhoods retain that early-20th-century character even as the city has grown into a full-service urban center. This combination of a university, a historic downtown, strong rail connections, and established neighborhoods gives Fullerton a distinctive, multi-layered urban character within Orange County.