The largest reptiles ever measured, ranked by maximum body length — from the reticulated python to the leatherback sea turtle.
Quick answer: 1. Reticulated Python (Malayopython reticulatus), 2. Green Anaconda (Eunectes murinus), 3. African Rock Python (Python sebae), 4. Gharial (Gavialis gangeticus), 5. Saltwater Crocodile (Crocodylus porosus), 6. Nile Crocodile (Crocodylus niloticus), 7. Orinoco Crocodile (Crocodylus intermedius), 8. American Alligator (Alligator mississippiensis), 9. Komodo Dragon (Varanus komodoensis), 10. Leatherback Sea Turtle (Dermochelys coriacea).
Reptiles come in extreme sizes, from the tiny Brookesia chameleon (not much bigger than a housefly) to the massive saltwater crocodile, which can exceed 6 meters and weigh over a tonne. This list ranks the largest reptiles by maximum recorded body length. For snakes, this means total body length; for crocodilians and lizards, nose-to-tail length; for turtles, carapace length. All measurements are drawn from verified field records, museum specimens, and published scientific accounts.
The longest snake in the world. The longest reliably measured specimen was a 7.67 m individual from Indonesia. Unverified claims of 10 m+ snakes exist, but 7–8 m is the accepted maximum.
The green anaconda is the heaviest snake species and the second-longest. The largest reliably measured specimen was 7.5 m long, though unverified reports of 9–10 m snakes persist in South American folklore.
The African rock python is Africa's largest snake. The longest reliably measured specimen was 7.5 m, though most individuals are considerably smaller at 3–4 m.
The gharial is a long-snouted crocodilian native to the Indian subcontinent. Males can reach over 6 m, distinguished by the bulbous growth on the tip of their snout.
The saltwater crocodile is the largest living reptile by weight. The largest reliably measured specimen was a 6.17 m male from the Philippines in 2011 (Lolong).
The Nile crocodile is Africa's largest reptile. The largest verified specimen measured 6.16 m, though individuals over 5 m are increasingly rare due to hunting and habitat loss.
The Orinoco crocodile is one of the largest crocodilian species and a critically endangered apex predator of the Orinoco River basin.
The American alligator is the largest reptile in North America. The largest verified specimen was a 4.39 m male from Alabama.
The Komodo dragon is the largest living lizard. The largest verified specimen measured 3.13 m in length and weighed 166 kg. They are apex predators on Indonesian islands.
The leatherback is the largest sea turtle and the largest living turtle species. The largest reliably measured specimen weighed 916 kg with a carapace length of 2.2 m.
| # | Name | Type | Range | Max weight | Avg adult length |
|---|---|---|---|---|---|
| 1 | Reticulated Python (Malayopython reticulatus) | Snake | Southeast Asia | ~158 kg | 3–6 m |
| 2 | Green Anaconda (Eunectes murinus) | Snake | South America (Amazon) | ~227 kg | 4–6 m |
| 3 | African Rock Python (Python sebae) | Snake | Sub-Saharan Africa | ~91 kg | 3–4.5 m |
| 4 | Gharial (Gavialis gangeticus) | Crocodilian | India, Nepal (Ganges basin) | ~250 kg | 3.5–5 m |
| 5 | Saltwater Crocodile (Crocodylus porosus) | Crocodilian | Southeast Asia to Australia | ~1,500 kg | 4–5 m |
| 6 | Nile Crocodile (Crocodylus niloticus) | Crocodilian | Sub-Saharan Africa | ~1,090 kg | 4–5 m |
| 7 | Orinoco Crocodile (Crocodylus intermedius) | Crocodilian | Colombia, Venezuela (Orinoco basin) | ~680 kg | 3–5 m |
| 8 | American Alligator (Alligator mississippiensis) | Crocodilian | Southeastern United States | ~458 kg | 3–4 m |
| 9 | Komodo Dragon (Varanus komodoensis) | Lizard | Indonesia (Komodo, Rinca, Flores) | ~166 kg | 2–2.5 m |
| 10 | Leatherback Sea Turtle (Dermochelys coriacea) | Turtle | Global (oceans) | ~916 kg | 1.5–1.8 m |
Reptiles are ranked by maximum verified body length in meters, drawn from published scientific literature, museum records, and authoritative wildlife databases. For species where multiple measurement methods exist, the list prioritizes total length records with the most reliable verification. Some historical records (e.g., 19th-century crocodile claims) are excluded unless corroborated by modern analysis.
The reticulated python is the longest reptile, with a verified specimen measuring 7.67 m.
The saltwater crocodile is the heaviest living reptile, reaching over 1,500 kg and lengths of 6 m or more.
The Komodo dragon is the largest lizard, reaching up to 3.13 m in length and 166 kg in weight.