Kidd's Mills Covered Bridge Historic District in Pymatuning Township, Pennsylvania, preserves a historic bridge site tied to the area's small-scale industrial past. Listed on the National Register of Historic Places in 1974, the district centers on the Kidd's Mills Covered Bridge, a wooden bridge built in 1868. Its greatest significance is as a rare eastern United States example of a Smith Cross Truss design. The district also includes two contributing sites associated with former grist mills, connecting the bridge to the milling landscape and local activity it once served.