五英寻国家海洋公园(英语：Fathom Five National Marine Park)是一座位于加拿大安大略休伦湖乔治亚湾的国家海洋保护区域。

Fathom Five National Marine Park is a National Marine Conservation Area in the Georgian Bay part of Lake Huron, Ontario, Canada, that seeks to protect and display shipwrecks and lighthouses, and conserve freshwater ecosystems. The many shipwrecks make the park a popular scuba diving destination, and glass bottom boat tours leave Tobermory regularly, allowing tourists to see the shipwrecks without having to get wet. Many visitors camp at nearby Bruce Peninsula National Park and use the park as a base to explore Fathom Five and the surrounding area during the day.