World's Largest Marine Reserves

This table was updated on June 1, 2018.

This table lists the world's largest highly protected marine reserves. Pew's Global Ocean Legacy campaign collaborates with local communities, governments, and scientists to protect and conserve some of the planet's most important and unspoiled ocean environments through the creation of marine reserves. To date, our efforts have helped safeguard some 2 million square miles (5.2 million square kilometers) of ocean—an area 10 times the size of Central America. This accounts for about 80 percent of all fully protected ocean areas to date.