Top 10 Biggest Snakes in the World

Written by AZ Animals Staff
Updated: June 25, 2022
Image Credit Kurit afshen/
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Key Points:
  • The longest snake in the world is the green anaconda with a whopping length of 30 feet. Green anacondas live in Brazilian swamps and the Amazon Rainforest, and feed on pigs and deer after squeezing them to death.
  • Inhabiting marshes of Southeast Asia and China, Burmese pythons are vulnerable due to habitat destruction, being trapped and killed for their skins, and being used as food.
  • The king cobra, which can grow up to 13 feet long, is not only one of the world’s longest snakes, but holds the number one spot for the longest venomous snake in the world.

What is the biggest snake in the world? With more than 3,000 species of snakes living around the globe, there are a lot of candidates to consider. The largest snakes listed here were chosen because of their extraordinary length. The snakes with tremendous length combined with a large weight ranked even higher on the list.

#10. The King Brown Snake – 11 Feet Long

Biggest Snakes: The King Brown Snake
The King Brown Snake usually shelter in burrows, deep soil cracks, logs, rock piles, and timber or rubbish piles when living near humans.

Ken Griffiths/

The king brown snake (Pseudechis australis) can grow to a length of 11 feet. Though this snake is 11 feet in size, it only weighs around 13 pounds. This venomous snake lives in the grasslands, woods, and scrublands of central Australia. Its mixture of yellow and brown scales helps to camouflage it as it moves its long body in search of frogs and lizards. It has a conservation status of Least Concern with a decreasing population.

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#9. The King Cobra – 13 Feet Long

Biggest Snakes: The King Cobra
The King Cobra are the only snake that builds nests for its eggs. The female will guard the eggs until they hatch.

Vova Shevchuk/

The king cobra (Ophiophagus hannah) can grow to be 13 feet in length with a weight of 20 pounds. The king cobra is not only one of the largest in the world, but it also claims the title of the longest venomous snake on earth!

They live in India, Southeast Asia and are found in rainforest habitats. These snakes can make themselves look even bigger when they ‘stand up’ or lift the top half of their body off the ground, in response to a threat. Its conservation status is Vulnerable, but it is a protected species in Vietnam.

#8. The Boa Constrictor – 13 Feet Long

Biggest Snakes: The Boa Constrictor
Boa constrictors have some sharp teeth which they use to latch onto their prey and hold tight while they wrap the rest of their body around their prey.


The boa constrictor (Boa constrictor) and a king cobra can both grow to be 13 feet in length. However, the boa constrictor is ranked higher on the list because it’s the heavier of the two at 60 pounds. Boa constrictors measure 2 feet in size as newborns. So, it’s no surprise they are one of the largest snakes in the world. These snakes live in South America. Some of them live in rainforests while others live in a semidesert habitat.

#7. The Black Mamba – 14 Feet Long

Biggest Snakes: The Black Mamba
Black Mambas are also among the fastest snakes in the world, slithering at speeds of up to 12.5 miles per hour.

Cormac Price/

The Black Mamba (Dendroaspis polylepis) can grow to a length of 14 feet. This snake is venomous and lives on savannas in the eastern and central parts of Africa. The slender black mamba only weighs about 3 pounds making it easy to move its long body at a speed of 12.5 miles per hour. The conservation status of this reptile is Least Concern with a stable population.

#6. The African Rock Python – 16 Feet Long

Biggest Snakes: The African Rock PythonBiggest Snakes: The African Rock Python
Like all pythons, the African Rock Python is non-venomous. It kills by constriction, ambushing and coiling around its prey.


The African rock python (Python sebae) can grow to a length of 16 feet. This reptile can have a weight of up to 250 pounds. It lives on the grasslands and the savannas of Africa. This snake wraps its large body around prey using its powerful muscles to suffocate them. These snakes are known to eat antelope, crocodiles, warthogs, and other large-size prey.

#5. The Indian Python – 20 Feet Long

Biggest Snakes: The Indian Python
Main threats to Indian pythons include habitat loss, collection for the pet trade, and hunting for their skin which is highly valued in the leather trade.


The Indian python (Python molurus) can grow to a length of 20 feet and sometimes longer. They have a weight of around 150 pounds. This reptile lives in the forests of Pakistan, India, Nepal, and Sri Lanka.

This snake has a diet of small mammals and birds. Like other pythons, it captures its prey with strong jaws, then wraps its body around the animal to suffocate it.

Unfortunately, this reptile has a conservation status of Vulnerable. It’s hunted for its skin and consumed as food in some places. Loss of habitat is also affecting the population of this snake.

#4. The Burmese Python – 23 Feet Long

Biggest Snakes: The Burmese Python
Burmese pythons are solitary animals and only really come together to mate in the spring.

Heiko Kiera/

The Burmese python (Python bivitattus) has a length of up to 23 feet and can weigh up to 200 pounds. This reptile lives in the marshes of southeast Asia including China. Its body has a girth, or thickness, equal to a telephone pole! Like other pythons on this list, a Burmese python wraps its strong body around its prey to suffocate it.

Their conservation status is Vulnerable with a decreasing population. These snakes are trapped and killed for their skin and used as food. Habitat destruction has also contributed to decreasing the prey of this snake, therefore, lowering its overall population.

Burmese pythons have become an invasive species in the Everglades of Florida due to escaping captivity as pets. Recently, the largest invasive Burmese python was captured in Florida. The female snake is 18 feet long and weighs 215 pounds. The Conservancy of Southwest Florida has been implanting radio transmitters in male scout snakes and releasing them into the wild to locate breeding aggregations where where large, reproducing females can be found. They seek to remove these females from the wild in hopes of slowing their growing numbers.

#3. The Amethystine Python – 27 Feet Long

Biggest Snakes: The Amethystine Python
Amethystine Pythons are very good swimmers and will travel by water when it is required.


The amethystine python (Morelia amethistina) can grow to a length of 27 feet and weigh 33 pounds. Females are usually larger than males. This reptile lives in Indonesia, Papua New Guinea, and Australia. Its habitat includes tropical forests, savannas, and shrublands. The conservation status of this snake is Least Concern with a stable population.

#2. The Reticulated Python – 29 Feet Long

Biggest Snakes: The Reticulated Python
The Reticulated Python is one of the snakes very popular with expert reptile keepers.


A reticulated python (Python reticulatus) can grow to a length of 29 feet and has a weight of up to 595 pounds! It’s called a reticulated python because of the mixed pattern of its brownish-yellow and black scales. The female reticulated python is usually larger than the male. This reptile lives in the rainforests and marshes of southeast Asia, Bangladesh, and Vietnam. Their conservation status is Least Concern.

#1. The Green Anaconda – 30 Feet Long

Biggest Snakes: The Green Anaconda
The Green Anaconda give birth to live young, that are about two feet long when they are born.

Patrick K. Campbell/

The green anaconda (Eunectes murinus) is the biggest snake in the world! It grows to a length of 30 feet and can weigh up to 550 pounds. If you stretched out a green anaconda to its full length, it would be about as long as the average school bus! Normally, female green anacondas are larger than males.

The snake that claims the title of biggest in the world lives in the Amazon rainforests and swamps of Brazil. They are carnivores capturing their prey of wild pigs and deer by wrapping their tremendous bodies around them and squeezing until the prey is dead.

Summary of the Top 10 Biggest Snakes in the World

Here’s a look back at the 10 biggest snakes inhabiting our planet:

1Green Anaconda30 Feet Long
2Reticulated Python29 Feet Long
3Amethystine Python27 Feet Long
4Burmese Python23 Feet Long
5Indian Python20 Feet Long
6African Rock Python16 Feet Long
7Black Mamba14 Feet Long
8Boa Constrictor13 Feet Long
9King Cobra13 Feet Long
10King Brown Snake11 Feet Long

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