Kilmanagh is an unincorporated community in Huron County in the U.S. state of Michigan. The community is situated at .[1] at the corners of four townships:
Kilmanagh was first called Thompson's Corners, for Francis Thompson, an Irish homesteader who arrived in 1861. The name Kilmanagh was first used to describe the nearby Shebeon Creek, which would overflow each spring. A post office named Kilmanagh operated from February 1873 until June 1904.[2]