www.stocktongov.com Stockton, California, the seat of San Joaquin County, is the fourth-largest city in the Central Valley of the U.S. state of California. With a population of 291,707 at the 2010 census, Stockton ranks as the state's 13th largest city. The city is located in Northern California south of the state capital Sacramento and north of Modesto. Stockton is along Interstate 5, State Route 99 and State Route 4 amid the farmland of the California Central Valley. It is connected westward with San Francisco Bay by the San Joaquin River's 78-mile (126 km) channel, and is, with Sacramento, one of the state's two inland sea ports. In and around Stockton are thousands of miles of waterways and rivers that make up the California Delta. The city hosts the annual Asparagus Festival and is the location of Haggin Museum, an art and history museum built in Victory Park in 1931. The museum displays 19th and 20th century works of art and houses local historical exhibits. For much of the later 19th century, starting with the Gold Rush, Stockton was one of the largest cities in the state, for a while the third largest city.