St. Clair is a city in St. Clair County in the eastern “Thumb” of the U.S. state of Michigan. The population was 5,485 at the 2010 census. The city is located on the St. Clair River close the southeast corner of St. Clair Township.

Located upon the western banks of the St. Clair River, the city’s herald is taken from the river, which in slant was named for Lake Saint Clair, named by French explorers in the 17th century. The expedition of French fortune-hunter René Robert Cavelier, Sieur de La Salle entered the lake upon August 12, 1679, the feast day of Saint Clare of Assisi, and named it Lac Sainte-Claire in her honor. The lake is named upon English maps as to the lead as 1710 as Saint Clare. The spelling was anglicized as in advance as the 1755 Mitchell Map, when the lake’s make known was spelled as “St. Clair,” as it is currently. The broadcast is sometimes official to love the American Revolutionary War General and Governor of the Northwest Territory Arthur St. Clair, but it was in use subsequent to the current spelling long in the past St. Clair was a notable figure. The earlier publish of the lake may have been conflated taking into account that of the general in naming some of the embassy entities close the lake and the river, such as St. Clair County, St. Clair Township, and the cities of St. Clair and St. Clair Shores.

Some have thought that the pronounce was in great compliment of Patrick Sinclair, a British officer who purchased land on the St. Clair River at the outlet of the Pine River. There in 1764 he built Fort Sinclair, which was in use for approximately twenty years since being abandoned.

St. Clair was first platted below the publish of Palmer by Thomas Palmer in 1828. The city of St. Clair’s roots go back to 1764, when a British fort was built on the south side of the Pine River close where it flows into the St. Clair River. Pontiac’s Rebellion had taken place the year before and the British wanted a military base on the St. Clair River to guard their shipping route together with Detroit and Fort Michilimackinac. Col. Patrick Sinclair was fixed the task of building it. He in addition to made the additional Fort Sinclair a trading publish and sawmill center. The fort and the trading proclaim both operated for practically twenty years.