Hello how may I help you? I need help with World Records i can help with world records. What was the biggest snake ever? Do you mean the single largest snake on record or what type of snake is the largest? Both please. Single largest snake first The single largest snake is Medusa. Ok, what type of snake is largest? The reticulated python is the largest snake species. Great, thanks That Medusa I feel needs more research. I think it's possible larger snakes may have been found but not registered with Guiness world records?