Port Sanilac, MI is a city located in Sanilac County, Michigan and has a land area of 7.89 square miles (20.44 km2). The water area for the city is 0.86 square miles or 2.23 km2. There is one unique zip code in Port Sanilac, Michigan and it is 48469. The area code(s) for Port Sanilac is 810.
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