Duncanville is an unincorporated community in Tuscaloosa County, Alabama, United States. Duncanville is located along U.S. Route 82, 12.5 miles (20.1 km) southeast of Tuscaloosa. Duncanville has a post office with ZIP code 35456, which opened on August 22, 1898. Duncanville was named in honor of either William M. Duncan, a local property owner, or W. Butler Duncan, an official with the Gulf, Mobile, and Northern Railroad.
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