Underwater mountains ranked by height from base to summit.
| # | Seamount | Location | Height | Notes |
|---|---|---|---|---|
| 1 | Mauna Kea | Hawaii, Central Pacific | 10,211 m | Dormant volcano; tallest mountain on Earth measured from base. Summit 4,205 m above sea level. |
| 2 | Monte Pico | Azores, North Atlantic | 8,449 m | Guinness record holder for highest underwater mountain face. Summit 2,351 m above sea level. |
| 3 | Nintoku Seamount | NW Pacific, Emperor Chain | ~5,000 m | Flat-topped guyot in the Hawaiian-Emperor seamount chain. Last erupted ~66 million years ago. |
| 4 | Suiko Seamount | NW Pacific, Emperor Chain | ~4,500 m | Guyot named for Empress Suiko of Japan. Summit ~951 m below sea level. |
| 5 | Ioah Guyot | Western Pacific, Magellan Seamounts | ~4,500 m | Shield volcano near Marshall Islands. Erupted alkali basalt ~87 million years ago. |
| 6 | Horizon Guyot | Mid-Pacific Mountains | ~4,300 m | Elongated ridge over 300 km long. Largest seamount in the Mid-Pacific Mountains. |
| 7 | Kahalewai Seamount | Central Pacific | ~4,200 m | Recently re-mapped; found to be ~1,000 m taller than previously thought. |
| 8 | Great Meteor Seamount | NE Atlantic, south of Azores | ~4,200 m | Largest seamount in the North Atlantic by volume. Summit ~270 m below sea level. |
| 9 | Tamu Massif | NW Pacific, Shatsky Rise | ~4,057 m | Largest known single volcano on Earth by area (~120,000 sq mi). Formed ~145 million years ago. |
| 10 | Bear Seamount | NW Atlantic, New England Chain | ~4,000 m | Oldest seamount in the New England chain (~100-103 million years old). |
| 11 | Bounty Seamount | South Pacific, Pitcairn-Gambier Chain | ~3,950 m | Peak reaches ~420 m below the ocean surface. |
| 12 | Coloso Seamount | SE Pacific, off Chile | ~3,831 m | Part of a chain running parallel to the Chilean coast. |
| 13 | Eltanin Seamount | Southern Ocean | ~3,688 m | Named after research vessel RV Eltanin which discovered it in the 1960s. |
| 14 | Rano Rahi | South Pacific | ~3,600 m | Part of the Macdonald seamount chain. |
| 15 | Koko Seamount | NW Pacific, Emperor Chain | ~3,550 m | Part of Hawaiian-Emperor chain. Formed ~55 million years ago. |
| 16 | Detroit Seamount | NW Pacific, Emperor Chain | ~3,395 m | Part of the Emperor seamount chain. Formed ~47 million years ago. |
| 17 | Bowie Seamount | NE Pacific, off British Columbia | ~3,100 m | Also called SG-aan Kinghlas in Haida. Summit only ~24 m below sea level. Marine Protected Area. |
| 18 | Nazca Ridge Seamount | SE Pacific, off Chile | ~3,109 m | Discovered in 2024. Home to sponge gardens and ancient corals. |
| 19 | Kama'ehuakanaloa | Hawaii, Central Pacific | ~3,000 m | Active submarine volcano; youngest in the Hawaiian chain. Summit ~975 m below sea level. |
| 20 | Davidson Seamount | NE Pacific, off California | ~2,280 m | Part of Monterey Bay National Marine Sanctuary. Known for diverse marine ecosystems. |