Fifty years ago, a new era of ocean conservation was born by creating a system of national marine sanctuaries. Since then, the National Marine Sanctuary System has grown into a nationwide network of 15 national marine sanctuaries and two marine national monuments that conserve more than 620,000 square miles of spectacular ocean and Great Lakes waters, an area nearly the size of Alaska.

Each national marine sanctuary and marine national monument has its own unique history and purpose. These underwater parks were set aside for both protection and enjoyment, now and in the future—and decisions about how to best manage each of these special places continue to be made using the best available scientific data, as well as extensive public input.

We believe that water is a thread that connects us all. National marine sanctuaries and monuments support coastal communities and drive local economies by providing jobs and opportunities for people to discover, recreate, and form lifelong connections with these spectacular places. The successes throughout the National Marine Sanctuary System show that conservation, economic prosperity, and human well being not only go well together, but they are deeply woven together in our national character.

The National Marine Sanctuary System turns 50 on October 23, 2022. Please join us throughout the next year as we celebrate the history, accomplishments, and beauty of these incredible underwater parks across the United States!