Southwest National Bank (Weatherford, OK) is a banking company based out of 720 E MAIN, Weatherford, Oklahoma, United States. Southwest National, a "customer friendly" locally owned, community bank was originally chartered June 4, 1907, as the First National Bank of Custer City. At both the Custer City and Weatherford locations banks goal is to meet its customers' needs by offering competitive rates and making in-house loan decisions quickly.