Kanawha Falls is an unincorporated community in Fayette County, West Virginia, United States. Kanawha Falls is located on the east bank of the Kanawha River, 2 miles southwest of Gauley Bridge and 0.6 miles downstream from the waterfall of the same name. Kanawha Falls had a post office, which opened on March 26, 1856, and closed on Novemb…Kanawha Falls is an unincorporated community in Fayette County, West Virginia, United States. Kanawha Falls is located on the east bank of the Kanawha River, 2 miles southwest of Gauley Bridge and 0.6 miles downstream from the waterfall of the same name. Kanawha Falls had a post office, which opened on March 26, 1856, and closed on November 2, 2002.