Barton City is an unincorporated community in Alcona County in the U.S. state of Michigan. It is situated about 2 miles north of M-72 in the Huron National Forest on the shore of Jewel Lake. Most of the community is within Millen Township, although nearby settlement extends north into Hawes Township. The ZIP code, 48705, serves a much larger area including large portions of Millen, Hawes, and Mitchell Township.Barton City is at 44°41′03″N 83°36′20″W / 44.68417°N 83.60556°W / 44.68417; -83.60556 with an elevation of 830 feet above sea level.Barton City was the site of the main branch of the Potts Lumbering Company and the Loud Lumbering Company. First called "Mud Lake", because of its location on the shores of what is now known as Jewell Lake, a post office named Mud Lake was established on March 10, 1887, with George W. LaChapelle as postmaster.