Long Neck Dinosaurs

Dinosaurs with long necks are called sauropods – herbivorous dinosaurs from the Mesozoic era. They had really long necks of up to 30 ft (9.1 m), tree trunk-like legs, long tails, and relatively small heads. Their long necks helped them eat vegetation from treetops. They lived for approximately 140 million years. Their enormous sizes make them stand out among the different types of dinosaurs.

List of Top 15 Long-Necked Dinosaurs

1. Alamosaurus

The Alamosaurus is the most giant sauropod to be identified from North America that lived between 70-65 million years ago. It was approximately 69 ft (21 m) long and 33 tons in weight.

2. Amargasaurus

The tall spikes on its neck make the Amargasaurus stand out. Paleontologists suggest it might have used its long spines to defend itself against its enemies.

3. Anchisaurus

The late Jurassic Period saw the Anchisaurus walking the Earth. That was about 150-144 million years ago. They were sauropods but much smaller than some of their relatives. A unique characteristic of the dinosaur was that it could walk on two and four legs, unlike the other sauropods.

4. Apatosaurus

This type of long neck dinosaur lived in the Jurassic period 150 million years ago. It weighed up to 20 tons. They were 13-18 ft (4-5.5 m) tall and about 75.5 ft (23 m) long. The neck was longer than any other body part, with a length of around 20 ft (6 m).

5. Argentinosaurus

This is arguably the longest and heaviest terrestrial animal to have lived on the Earth. It is estimated to have a length of 98-118 ft (30-35 m) and a weight of 66-97 tons. It lived in the late Cretaceous period, some 97-93.5 million years ago.

6. Brachiosaurus

This member of the Sauropod family is the most well-known of all dinosaurs. It gets its name from the great height of its upper arm bone or humerus, which is taller than most humans. It was considered the tallest dinosaur for almost a century, with a height of 66 ft (20 m). But later, other taller dinosaurs were discovered. They had a bump on their heads that is thought to house the nostrils.

7. Brontosaurus

This dinosaur is almost 66 ft (20 m) long and weighs more than 20 tons. It had a whip-like tail and spoon-shaped teeth. The forelimbs were slightly smaller than the hind limbs.

8. Camarasaurus

The length of this common dinosaur from the Jurassic period was around 50-65 ft (15-20 m), and its height was 20 ft (6 m). It was estimated to weigh about 20 tons. Their diet mainly consisted of conifers, the dominant plant during their time.

9. Diplodocus

Diplodocus was once thought to be the longest-known dinosaur. Its neck reached over 20 ft (6 m) in length, and the long tail had 80 vertebrae.

10. Dreadnoughtus

Dreadnoughtus is named after the huge Dreadnought battleship. It walked the Earth from the late Jurassic period until dinosaurs became extinct. It walked on all fours and lived in Argentina and other parts of South America.

11. Haplocanthosaurus

This terrible lizard lived 152-155 million years ago. They were on the smaller side, with a length of 39 ft (12 meters) and a weight of around 14 tons.

12. Mamenchisaurus

The Mamenchisaurus could reach lengths of over 50 ft (15.24 m) with necks up to 30 ft (9.14 m) long! This is what some scientists believe, but the estimates vary. It is one of the few dinosaurs with both backbones and cervical ribs, as most other types only had cervical ribs.

13. Omeisaurus

Omeisaurus is a long-necked dinosaur that inhabited Asia in the late Jurassic period. Though some could reach as much as 98.4 ft (30 m) in length, their tails were relatively small.

14. Patagotitan

The extremely long neck of this Argentine dinosaur gave its body a whopping estimated length of 102 ft (31 m). It walked the Earth in the late Cretaceous period, around 102 million years ago.

15. Ultrasaurus

The name of this dinosaur means “greater lizard”. It lived 110 million years ago during the Cretaceous period in Korea. Its neck could reach a length of up to 50 ft (15.24 m).


Q. Name the long-necked dinosaur featured in the movie Jurassic Park.

A. The Brachiosaurus was the long neck dinosaur featured in the movies Jurassic Park and Jurassic World.

Q. How tall are long-neck dinosaurs?

A. The height of long neck dinosaurs ranged from 6 m – 21 m depending on the type.

Q. What is the biggest long neck dinosaur?

A. The Argentinosaurus is the largest long neck dinosaur.