Locke (), also known as Locke Historic District, is an unincorporated community in California's Sacramento–San Joaquin River Delta. The 10 acre town was built between 1893 and 1915 approximately one mile north of the town of Walnut Grove. Prior to the railroads and town, the delta swampland was home to Native American Miwoc and Maidu tribes for hundreds of years. Tribal burial grounds exist on the Locke parcel. The village of Lockeport began where the Sacramento Valley Railway and Union Pacific Railroads merged at the southwest corner of