Antioch is a city in Contra Costa County, California, set on the banks of the San Joaquin River at the edge of the Sacramento-San Joaquin Delta. Located about 45 miles from San Francisco, it is the largest city in eastern Contra Costa County and serves as the commercial and civic heart of the region's eastern edge. Its northern boundary is formed by the river, giving the city a waterfront character unusual among Bay Area suburbs. The city's history is among the oldest in the East Bay. Founded in the 1850s during the Gold Rush era, Antioch began as a river town tied to shipping and agriculture, and its downtown retains some of that nineteenth-century heritage. The twentieth century brought industrial and residential growth, and the 1980s and early 2000s saw substantial housing expansion as Bay Area families moved east for more space and relative affordability. That growth transformed Antioch into a large suburban city of roughly 115,000 people. Today Antioch balances several roles: a commuter base linked to San Francisco by BART, a regional retail and services center for eastern Contra Costa County, and a gateway to Delta recreation. The Antioch Unified School District serves the city and part of neighboring Oakley, while Contra Loma Regional Park and the riverfront anchor outdoor life. Major employers include the school district, healthcare providers, and retail, with many residents commuting west along Highway 4 or by rail. For someone considering a move, Antioch offers a relatively attainable East Bay address with Delta waterfront access, regional parks, and a direct BART connection. It appeals especially to families, first-time buyers, and commuters who value space and outdoor recreation and are willing to live at the eastern edge of the Bay Area's rail network.