Appleton Milo Harmon (May 29, 1820 – February 27, 1877) was an early member of the Church of Jesus Christ of Latter-day Saints and a leading pioneer of the emigration to Salt Lake City and the settlement of Utah Territory. Harmon was born in Conneaut, Pennsylvania, the son of Jesse Pierce Harmon and Annie Barnes, he married Elmeda Stringham in 1846. He was devoted to his religion and was an industrious and multi-talented builder who constructed sawmills, a cotton factory, pony express roads, furniture, wagons, and worked as a farmer, blacksmith, policeman and other trades.