The following data are from the World Database on Protected Areas, compiled by the UNEP World Conservation Monitoring Centre. Information on each of the MPAs is available at

Southern Hemisphere:

  1. Kermadec Benthic Protection Area, New Zealand: 620,467 km2
  2. Chagos Environment Preservation and Protection Zone, British Indian Ocean Territory: 544,000 km2
  3. Phoenix Islands Protected Area, Kiribati: 410,500 km2

Northern Hemisphere:

  1. Papahanaumokuakea World Heritage Site, US: 362,075 km2
  2. Marianas Trench Marine National Monument, US: 246,608 km2
  3. Pacific Remote Islands Marine National Monument, US: 225,038 km2