Communities

• Cedarville is an unincorporated community at the junction of M-129 and M-134 at 45°59′53″N 84°21′47″W^[8] north of the Les Cheneaux Islands, about 2 miles (3 km) east of Hessel, and about 35 miles (56 km) due south of Sault Ste. Marie. It began as a lumber settlement on the Lake Huron shore in 1884. A post office was established in July 1888.^[9] The ZIP code of 49719 serves most of Clark Township. The Les Cheneaux Historical Association ^[10] runs the Historical Museum and the Maritime Museum, both in Cedarville.
• Coryell Islands in this township had a post office from 1908 until 1958.^[11]
• Hessel is an unincorporated community on M-134 north of Marquette Island, the largest of the Les Cheneaux Islands at 46°00′15″N 84°25′33″W.^[12] It was founded in 1885 by two Swedes and a Norwegian, John and Carl Hessel and John A. Johnson, and a post office was established in September 1888.^[9] The ZIP code of 49745 serves Hessel and the western part of Clark Township.^[13] Hessel is the home of the Antique Wooden Boat Show and Festival of the Arts,^[14] which is held annually at the public docks on the second weekend of August. Les Cheneaux Culinary School is also there.^[15]
• Patrick Landing is a named place in the township approximately one mile southwest of Cedarville on the Les Cheneaux Channel at 45°59′05″N 84°22′38″W.^[16]
• Port Dolomite is a commercial port in the eastern end of the township at 45°59′05″N 84°16′30″W.^[17] In 2004, it was the 93rd largest port in the United States ranked by tonnage.