Following is the list of Top 10 Heaviest Living Reptiles as per Consensus Document on the Biology of Populus:
| Rank | Animal | Average Mass | Maximum Mass | Average Total Length |
| 1 | Saltwater Crocodile | 454 kg | 2000kg | 3.85m |
| 2 | Nile Crocodile | 382 kg | 1089kg | 3.7m |
| 3 | Leatherback Sea Turtle | 364 kg | 932kg | 2m |
| 4 | Black Caiman | 300 kg | 1310kg | 3.6m |
| 5 | Orinoco Crocodile | 290 kg | 900kg | 3.6m |
| 6 | American Crocodile | 277 kg | 1000kg | 3.5m |
| 7 | American Alligator | 260 kg | 1000kg | 3.1m |
| 8 | Aldabra Giant Tortoise | 205 kg | 360kg | 1.4m |
| 9 | Gharial | 200 kg | 977kg | 3.8m |
| 10 | Galapagos Tortoise | 175 kg | 400kg | 1.5m |
