Huffman, IndianaHuffman is an unincorporated community in Harrison Township, Spencer County, in the U.S. state of Indiana.HistoryAn old variant name of the community was Huffmans Mills. The town's proprietor, John R. Huffman operated a gristmill and sawmill and kept a store. A post office was established at Huffman in 1882, and remained in operation until it was discontinued in 1935.GeographyHuffman is located at.