Discover the Blue shores of Eastern Michigan. Port Huron..small city atmosphere with big-city amenities awaiting your arrival. Enjoy coffee houses, dine at our many waterfront restaurants, shop, golf, relax on our beaches, and swim in our clear beautiful blue waters. Located in St. Clair County, Port Huron is home to a historic downtown area, along with seaside marinas and a boardwalk. Be sure to check out the lighthouse, museums, and McMorran Place arena.