Algonac, MI is a city located in Saint Clair County, Michigan and has a land area of 19.03 square miles (49.29 km2). The water area for the city is 5.08 square miles or 13.16 km2. There is one unique zip code in Algonac, Michigan and it is 48001. The area code(s) for Algonac is 810.
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