Bay Shipbuilding Company (BSC) is a shipyard and dry dock company in Sturgeon Bay, Door County, Wisconsin. As of 2015, Bay Ships was a subsidiary of Fincantieri Marine Group and produces articulated tug and barges, OPA-90 compliant double hull tank ships and offshore support vessels. It also provides repair services to the lake freighter fleet. In the past the shipyard located in Sturgeon Bay has operated under several different names and traces its history back to 1918.

Sturgeon Bay is a city in and the county seat of Door County, Wisconsin, United States. The population was 9,646 at the 2020 census. Located at the bay of Sturgeon Bay for which it is named, it is the most-populous city on the Door Peninsula, a popular Upper Midwest vacation destination.