| Rank | Ocean | Average Depth (meters) |
|---|---|---|
| 1 | Pacific | 3,940 |
| 2 | Indian | 3,741 |
| 3 | Atlantic | 3,646 |
| 4 | Southern | 3,270 |
| 5 | Arctic | 1,205 |
Note: The Pacific is both largest and deepest. The Arctic is smallest and shallowest. The Southern Ocean (recognized 2000) surrounds Antarctica.