NOTOC There is more than one place called Stockton: United Kingdom Stockton-on-Tees - a town in County Durham, England United States of America Stockton (California) - A city in California, San Joaquin Valley. Stockton (Illinois) - A village in Illinois, Jo Daviess County Stockton (Kansas) - A city in Kansas, Rooks County. Stockton (New Jersey) - A town in New Jersey, Hunterdon County.