Top 10 Biggest Snakes in The World

  1. Olive Python
  2. Black Mamba
  3. Boa Constrictor
  4. Yellow Anaconda
  5. Indian Rock and Burmese Python
  6. King Cobra
  7. Green Anaconda
  8. African Rock Python
  9. Amethystine Python
  10. Reticulated Python


Big includes but length and weight. The snakes that are highlighted in this category both have outstanding lengths and weight. Some even have the title of the heaviest snake in the world and the longest snake in the world. We kept the best for the last. So, the snake sizes are from the least to the greatest.


Top 10 Biggest Snakes in The World

The olive python is a native of Australia and identifiable by its unique coloring. There are two subspecies of the olive python, they are the L.O Barroni and the L.O. Olivaceus. The first is the larger of the two. It can grow to over 13 feet in length. The second on the other hand is usually between 6.5 feet to almost 10 feet long. The olive python is not venomous. Its daily diet consists of mammals, birds and other reptiles. The Olive python is scientifically known as the Liasis olivaceus. A similar snake to this Australian python is the poisonous Mulga ( Pseudechis australis).


This is one large venomous snake located in Africa. It is the second most venomous snake in the world. It can cause death in a human after 45 minutes of its bite. It is scientifically called the Dendroaspis polylepis. The Black Mamba can be as long as 13 feet. Length varies and can start at 7 feet long. The longest black Mamba ever recorded is the 14.11 feet mamba. This incredible snake is also the fastest snake in the world. It is aggressive by nature and will strike without no provocation. So, next time you visit Africa, be on the lookout.


The Boa like other constrictors is not poisonous. It is a large snake with an intricate skin pattern and design. This colorful snake comes in tan, green, yellow, and red. Boas are native to Central and South America. They can grow as 14.11 feet in the wild. Boa constrictors held in captivity rarely grow beyond 8.2 feet. Female boas are always longer than the male boa constrictors. You can keep them in the home as pets since they are not dangerous to human beings. The Boa constrictor can weigh up to 100 lbs.

Boa constrictors are great climbers and are usually found in trees. They also swim well too. They constrict their preys to death. They prey on deer, monkeys, wild boars and birds.


It is the second largest Anaconda in the world. You find the yellow anaconda in the swamps, marshes, and rivers of South America. It is a member of the boa family that is non-venomous. The yellow anaconda likes to live alone, only during times of mating that it seeks out companionship.

This anaconda has yellow skin with black spots, from which its name was derived. The yellow anaconda loves to ambush its prey before killing them by constriction. Their skin gives them the perfect camouflage. Its diet consists of caimans, turtles, deers, peccaries, and fishes. This is no surprise because of the environment it lives in.  Yellow anacondas weigh up to 132 lbs. and can grow as long as 15 feet.


From the name, you can deduce where this snake originates from. You can find both in the tropic regions of Southeast and Southern Asia. Python molurus is the scientific name of the Indian rock python. It can grow as long as 15.1 feet. There are two species of the snake. The Burmese Python called the Python Bivattatus scientifically and the Indian rock python.

The Burmese python is slightly longer than the rock python. It is also darker in color. It can grow as long as 13.1 feet. The record shows a Burmese python that is as tall as 18.7 feet. The Burmese python is a favorite among snake breeders. It has amazing swimming abilities and as such loves hanging around water spots. If you intend to keep one, take note to include a lot of water. It will interest you to know that it has an albino variety as well.

Both Asian pythons can be found in Pakistan, India, Sri Lanka, Burma, China, Indonesia, Laos, Java, Borneo, Malaysia, and Nepal.


This is not called King just for the title. It is King because it is the longest most venomous snake in the world. The King Cobra has a non-aggressive personality when not disturbed. It will attack violently when confronted. The male King cobras are larger than female. They can grow as long as 18.7 feet and weigh as heavy as 19.8 lbs. They are found in Asia and they grow all throughout their lives. Cobra can grow as old as 30 years old.

Cobras are born with fangs and venom, so there are no small cobras. This means a baby King Cobra can attack and defend itself. King Cobras venom can be deathly fatal after 15 minutes. Their venom harms human but not themselves. The King Cobra is scientifically called Ophiophagus Hannah.


Eunectes Murinus is the scientific name for the Green Anaconda. This is one titleholding snake. The Green Anaconda is the heaviest snake in the world. Secondly, it is the largest living snake in the world. Finally, it is the second longest snake in the world. It is one of the aquatic group of snakes that lives in the tropical region of South America.

Green Anacondas weigh up to 551 lbs. and are as long as 23 feet. Although females are larger than males, their sizes are still massive. They are obviously called according to their skin color and pattern which is olive green with black blotches. The female green anaconda is known as the black widow in the snake kingdom. After mating with the males, the female may decide to eat him up. An interesting characteristic of the Green anaconda is that they tend to hibernate.

Green anacondas are sometimes referred to as water boa because most of its life is spent in the water. Like its sister the yellow anaconda, green anacondas are predatory in nature and move with incredible speed in water. Their eyes and nostrils are on top of their heads. This allows them to hide their bodies while they can seek out prey above water. Green anacondas can hunt even during the day. They are nocturnal and as such have heat-sensing pits that allow them to hunt at night.  They tend to swallow their prey whole after suffocating it to death. The Green Anaconda do not prey on humans rather they prey on crocodiles, caiman, tapir, fishes, deer, and turtles.


From the name, this is an African Python. It lives in the tropical forest and temperate grasslands of Central and Western Africa. One of the largest snake species in the world. A report claims an adult African rock python was as long as 23 feet. Unfortunately, it was killed in 1958. Normally, they grow between 5 and 7.5 meters long and can weigh up to 251 lbs. You can recognize them by their bold, dark blotches and markings.

It is also a solitary snake who seeks out a mate during the mating season. They eat crocodiles, monitor lizards, pigs, antelopes, and monkeys. A big meal can sustain the python for up to a year. During the dry season, the African rock python goes dormant to conserve energy for the next climate.


Another name for the Amethystine Python is the Scrub Python. This is the biggest nonpoisonous snake in Australia. Its home is in the grasslands and rainforests of Australia, Indonesia, West Papua, and Papua New Guinea. It can way up to 199 lbs. and grow as long as 27.9 feet. The scrub python is scientifically known as Morelia amethystine. Males are smaller than females.

Top 10 Biggest Snakes in The World

It is nocturnal like most snakes of the python family. It has heat-sensing pits along its jaws to hunt for prey at night. It also constricts its prey. The Amethystine python feeds on birds, small mammals, rats, and bats. Although, it has the capacity to eat prey twice its size. It loves to rest in treetops or elevated places.


This is a nocturnal snake that weighs up to 297 lbs. They can grow as long as 30 feet. The Reticulated Python is the longest living snake in the world. They are scientifically known as Python reticulatus.  The Reticulated Python is a very aggressive snake, luckily it is non-venomous. They are usually found in the woodlands, rainforests, and rivers in Southeast Asia.

They can be undetected in their habitat because of their skin color and patterns. The colors range from gold, green, black and olive with brown blotches. They feed on civet, rats, monkeys, deer, pigs, killing their prey with asphyxiation.

Snakes are fascinating. The shape, the slithering movement, how they shed their skin, the designs and patterns on them, and most especially their size. We love anything big because of the way it attracts attention and interest. Do you think your snake is big? Let’s investigate the sizes of snakes from the inception to the present.


Ages and centuries ago, big snakes existed and they still live among us. Records of their greatness and mystery is still in the pages of history. Detailed information may not be available but the little we know does a lot to the imagination. Here are some:


These were giants snakes believed to have lived about 60 million years ago. There is evidence of their existence from the fossils found in the Cerrejon Formation. The Titanboa could grow as long as 12.8 meters and weigh up to 1,140 kg. This pre-historic snake was discovered in the coal mine of the present La Guajira, Columbia. The 45 feet long snake lived in or near water during the Paleocene Epoch. The period following the end of the dinosaur era.  A snake that was as long as a school bus or a T-rex and as heavy as a small car.


The Gigantophis lived about 40 million years ago during the Late Eocene period. It has a length of about 33 feet. The name itself refers to the term “giant snake”. Charles William Andrews discovered this giant snake in Africa in 1901. The facts state that the Gigantophis was a carnivore who may have Moeritherium in its diet. A Moeritherium was a mammal that existed in that period that looked like an elephant. Discovery was made of another Gigantophis fossil in Asia, Pakistan to be precise in 2014.


A close relative to the Gigantophis and a carnivore as well. The Madtsoia is a scaly snake that is three times longer than a horse. It is believed to weigh as heavy as two car tires. The Madtsoia was found in South America, Europe, Madagascar, and Africa. Like other prehistoric snakes, it lived in the late Cretaceous period all through the Pleistocene Era.


You can call Pythons, Pythonidae. These are the group of snakes with members listed as the largest and biggest snakes in the world. Pythons are non-venomous. This group of snake consists of eight genera and 31 recognized species. They feed by constricting their preys until the prey experiences a cardiac arrest. They are members of the ambush predators. Pythons can be motionless while in ambush and then spring into sudden action to attack their prey. They do not crush their preys but prefer to swallow them whole. As a result, it takes weeks before full digestion occurs. They rarely attack humans, but they are often hunted and captured by humans. Below are the Genera of Pythons

  • Antaresia is the scientific genus for Children’s Pythons. They have four species
  • Aspidities is the scientific genus of the Shield Pythons. This group have two species
  • Bothrochilus is the scientific genus of the White-lipped Pythons having seven species
  • Liasis is the scientific genus of the Water Pythons. It has five species
  • Morelia is the scientific genus of the Tree Pythons having seven species also.
  • Python is the scientific genus of the True Pythons with another seven species

Pythons lay eggs and incubate them before they are hatched into baby pythons. Pythons are bulky and big for their age. They move in a rectilinear progression. In simple terms, they move by scooting forward in a straight line. They move at a speed of 1 mile per hour. Pythons can live up to at most, 35 years. The normal life expectancy is twenty-five years.


These are a group of aquatic snakes of the genus Eunectes. The word Eunectes means good swimmer. There are four recognized species of anacondas. Anacondas are known to constrict and crush their prey. They are the heaviest known snakes in the world, found in the tropical regions of South America. There is a giant Anaconda myth that is not scientifically proven. It is believed that anaconda can be as 100 feet long.

Anacondas are muscular and thicker than any other boas. They tend to have large heads with a thick black stripe that runs from their jaw to the eyes. Eyes and nostrils are on the head allowing the liberty to breathe and sea above water. Female anacondas are larger than males. Anacondas love the murky waters of swamps and slow-moving rivers. They are found in the rainforest where they love the heat and humidity. The four species of anacondas are

  • Green anacondas
  • Yellow anacondas
  • Bolivian anacondas
  • Dark-spotted anacondas

Dark-Spotted Anacondas

Anacondas constrict their prey and overwhelm the circulatory system. This hinders blood from getting to the brain. Most of their prey, however, die from drowning. Anacondas mating involves two to twelve male anacondas to one female.  The male fight to mate but the choice is up to the female. The female anacondas gestate for seven months and do not eat anything during the period. Anacondas give live births. The baby anacondas break through the membrane and start to fend for itself. In captivity, Anacondas can live up to 30 years and 10 years in the wild.


Below are three contenders for the World biggest snake. These are live examples of giant snakes that were caught or held captive. Some are confirmed and others have only picture and reports to back their existence. Regardless, these snakes’ humongous sizes are worth mentioning in this article.


The Medusa is the longest living snake in the world and currently holds the world record. It is still in captivity. It is a Reticulated Python that weighs 353 lbs. and is 767cm. At only 9 years old as of 2011, the owner believes the Medusa can still grow even longer and bigger. The Medusa’s owner is Fox productions in Missouri. You can find Medusa on the show titled “The Edge of Hell Haunted House” in Kansas City.


The capture of a 48 feet 8 inches reticulated python in Indonesia by villagers in 2003 got some media. The news from the local newspaper claims that the python weighs 983 lbs. The snake lives at a primitive zoo on the main island of Java. Its diet is consist of eating three to four dogs monthly. The confirmation of the existence of the reticulated Python by the Guinness Book of records is pending. If true, this will be the World biggest snake both in length and size.


Another reticulated python’s capture in a construction site in 2016 is worth mentioning. The Python made its home in an uncompleted flyover in Paya Terubong, Penang. An official known as Herme Herisyam who works with the Malayan government caught the snake. The Python was exactly 8 meters long and weighed 250kg. Pictures showing members of the Malaysia Civil Defense Force carrying the giant snake is available. Unfortunately, after taken into captivity, the python died three days later. This Malaysian Python is the longest Reticulated Python in the world for three days before it expired. Rough manhandling or injury may be the cause of the python’s death. Although it laid an egg before its death.


Now, we know all the big snakes and their weigh and sizes. It will be important for you to know how to measure your snake. Who knows, yours might be the next record holder as the world biggest snake.


Use a string to follow the contours of your snakes’ body from the head to tail. Take the string and put against a ruler to determine the length of your reptile in feet or meters. You should take three different measurements at different times. This is to allow and compensate for your snake’s movements and turns. You then finally, take an average of the three measurements to determine the true length of the snake.


You can simply use a ribbon measuring tape. Place it on your snake the get the exact measurement and length.


There are computer programs designed to help measure your snake easily. An example is Serpwidgets-Snake measurer. This is a program that was designed since 2001. It gives the accurate measurement of your snake’s length. It works using an uploaded picture of your snake from an aerial view. The picture must be taken when your snake is on a flat surface. You need to input a ruler length of your choice after clicking two points.

You then begin picking points on the snake’s length after the snake button is activated. You must start at one end until you get to the other end.  Once you are done, the program gives you your snake’s length in the desired units you chose.


You determine the choice of measurement that works for you and the snake. The third method may be too techy for some people. Others may like the simplicity and magic of technology. If you prefer Method 1 or 2, that is also fine. You may require the help of one or two people if you are measuring a big snake.


Size matters, how great to have one of the biggest snakes. However, the bigger the snake the bigger the demands and responsibilities it will cost you. Big snakes eat more food, needs a larger space and more care. If you are committed to giving your snake all your best, then go ahead. It is recommended that you start with a smaller sized snake if you are a beginner snake keeper. As you grow in experience, you will increase your capacity to care for the big ones.

Thanks for reading my article on the worlds biggest snakes.  Please leave a comment below.  Read here: WHY DID MY SNAKE DIE – 9 THINGS YOU DID NOT KNOW KILLS SNAKES

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