5 biggest tree in the world

1. General Sherman (tree)

The General Sherman is a giant sequoia (Sequoiadendron giganteum) tree located in the Giant Forest of Sequoia National Park in Tulare County, California. By volume, it is the largest known living single stem tree on Earth The General Sherman Tree is neither the tallest known living tree on Earth (that distinction belongs to the Hyperion tree, a Coast redwood), nor is it the widest (both the largest cypress and largest baobab have a greater diameter), nor is it the oldest known living tree on Earth (that distinction belongs to the Methuselah tree, a Great Basin bristlecone pine). With a height of 83.8 metres (275 ft), a diameter of 7.7 metres (25 ft), an estimated bole volume of 1,487 cubic metres (52,513 cu ft), and an estimated age of 2,300 – 2,700 years, it is however among the tallest, widest and longest-lived of all trees on the planet.

2. President (tree)

The President Tree is the name of a giant sequoia located in the Giant Forest of Sequoia National Park in the United States, east of Visalia, California. The tree is believed to be at least 3,000 years old. It is not the tallest giant sequoia tree in the world with a height of about 241 feet (73.5 metres), nor the widest at nearly 31 feet in diameter at the base, but it is the third largest tree in terms of volume in the world. As of 2002, the volume of its trunk measured about 1278 cubic meters.

The tree was named after President Warren G. Harding in 1923. Nearby trees include Chief Sequoyah, the 27th largest Giant Sequoia in the world, and the Congress Group, two dense stands of medium sized sequoias that represent the "House" and "Senate."

3. General Grant (tree)

While the world's tallest tree in the forest Grant Grove in Kings Canyon National Park, the height of 81.5 meters and has a volume of 1.320 m3. This tree is estimated to reach 2000 years.
The General Grant tree is the largest giant sequoia (Sequoiadendron giganteum) in the General Grant Grove section of Kings Canyon National Park in California and the second largest tree in the world. 

4. Lincoln (tree)

The Lincoln Tree is the name of a huge giant sequoia located in Giant Forest in Sequoia National Park. It is currently considered by many to be the fourth largest tree in the world. Wendell Flint, in his book "To Find The Biggest Tree", Sequoia Natural History Association (2002) stated that the Lincoln Tree has a volume of 44,471 cubic feet (1,259.3 m3). However, White and Pusateri, in "Sequoia and Kings Canyon National Parks", Stanford University Press (1949) indicated that the volume of the Lincoln Tree based on measurements made in the 1930s is 51,000 cubic feet (1,400 m3), which would make the Lincoln Tree the second largest tree in the world, after the General Sherman Tree. Wendell Flint was somewhat critical of the earlier measurements and he stated that he thought that it was appropriate to exclude a portion of the irregular base of the tree from his volume calculations, which in addition to some extrapolation differences from the earlier measurements, explains the smaller volume of 44,471 cubic feet (1,259.3 m3) that he obtained compared to the earlier figure. Although he chose to exclude it, Flint stated that the excluded portion of the base could just as easily be included in the calculations, presumably leading to the alternative volume of 51,000 cubic feet (1,400 m3) The Lincoln Tree has a maximum base diameter of 36.4 feet. Nearby trees include the President Tree, the Washington Tree, the Adams Tree, and the Franklin Tree. All of these trees are of great size, although the Washington Tree lost the hollow upper half of its trunk in 2005 after a fire.

5. Stagg (tree)

The Stagg tree (also formerly known as the Day Tree) is a giant sequoia in Alder Creek Grove. It is the fifth largest tree in the world and is believed to be over 3,000 years old. L. Day noticed the tree in 1931 and, with help from two others, he measured the tree in 1932. The tree was renamed around 1960 for Amos Alonzo Stagg (Stagg was a football coach at the University of Chicago). In 1993 a group of climbers climbed the tree to the very top and found there was a hollow room inside the trunk near the top.