In the city the population was spread out with 26.5% under the age of 18, 8.6% from 18 to 24, 31.6% from 25 to 44, 24.0% from 45 to 64, and 9.3% who were 65 years of age or older.
Come Summer With Us In Port Sanilac! Let Port Sanilac be your Michigan vacation destination. In the heart of the East Ports, Port Sanilac is a great place to bask in the sun, swim, sail, boat, fish, dive, backpack, golf, or camp out along the lake; making it like no other place else in Michigan.
St. Clair County, Michigan. St. Clair County is a county located in the U.S. state of Michigan bordering the St. Clair River. As of the 2010 census, the population was 163,040. It is the 13th-most populous county in the state, and the county seat is Port Huron, located at the north end of the St. Clair River at Lake Huron.