Oceans Ranked Smallest to Largest

World Oceans by Surface Area (Smallest → Largest)

1. Arctic Ocean: 14.1M km² (5.4M mi²)
2. Southern (Antarctic) Ocean: 20.3M km² (7.8M mi²)
3. Indian Ocean: 70.5M km² (27.2M mi²)
4. Atlantic Ocean: 106.4M km² (41.1M mi²)
5. Pacific Ocean: 165.2M km² (63.8M mi²)

Notes

• Southern Ocean recognized by IHO (2000); some older sources list only 4 oceans.
• Area includes marginal seas.
• Pacific alone > all other oceans combined.