Longest neck on a dinosaur
12 metre(s)
United States ()

The sauropod Sauroposeidon ("lizard earthquake god") – fossils of which were found in Oklahoma, USA, in 1994 – were herbivores with a neck that could stretch an estimated 11–12 metres (36–39 feet). Living about 110 million years ago, during the mid-Cretaceous period, individual vertebrae have been found that measured up to 1.2 metres (4 feet) long.

It was previously suggested that the Sauroposeidon's neck may have been as long as 17 metres (55 feet), but more recent estimates have downgraded this. It's now generally thought that 17–18 metres (55–59 feet) would have been the dinosaur's overall height, with its neck lifted off the ground.