Port Huron is a city in the U.S. state of Michigan and the county seat of St. Clair County. The population was 32,338 at the 2000 census. The city is adjacent to Port Huron Township but is administratively autonomous. It is joined by the Blue Water Bridge over the St. Clair River to Sarnia, Ontario in Canada. The city lies at the southern end of Lake Huron and is the easternmost point on land in Michigan. Port Huron is home to a Domtar Paper Mill; Mueller Industries; Achenson Colloids; and many companies related to the automobile industry. The city also features a historic downtown area, boardwalk, marina, museum, lighthouse, and the McMorran Place arena and entertainment complex. The city was a recipient of the All-America City Award in 2005.