Old Alton Bridge is a historic iron through-truss bridge connecting the cities of Denton, Texas and Copper Canyon, Texas. Built in 1884 by the King Iron Bridge Manufacturing Company, it originally carried horses and later automobiles over Hickory Creek at a location that once was a popular ford for crossing cattle. The bridge takes its name from the abandoned community of Alton, which between 1850-1856 was the seat of Denton County.

The heavily traveled Old Alton Bridge remained in constant use until 2001 when vehicle traffic was moved to an adjacent concrete-and-steel bridge. Prior to the new bridge, it was necessary for motorists to signal with a car horn before crossing the single lane span.