Largest Whale Species in the World

The Top Ten
1 Blue Whale The blue whale (Balaenoptera musculus) is a marine mammal and a baleen whale. Reaching a maximum confirmed length of 29.9 meters (98 ft) and weighing up to 199 metric tons (196 long tons; 219 short tons), it is the largest animal known to have ever existed. The blue whale's long and slender body can be of various shades of greyish-blue dorsally and somewhat lighter underneath. Four subspecies are recognized: B. m. musculus in the North Atlantic and North Pacific, B. m. intermedia in the Southern Ocean, B. m. brevicauda (the pygmy blue whale) in the Indian Ocean and South Pacific Ocean, B. m. indica in the Northern Indian Ocean. There is also a population in the waters off Chile that may constitute ...read more.

The female blue whale is 82 feet in the northern hemisphere population as an adult. The male is 79 feet in the northern hemisphere population as an adult.

2 Fin Whale
3 Sperm Whale

I just checked again and sperm whales are 52 ft but can get to 68 ft which is bigger than the 64 ft sei whale. Sperm whales also weight more but if you are going by weight then the right whale is bigger. In fact the right whale is 60 ft, also bigger than the sperm whale, and weighs 100 tons while the sperm whale weighs 40-60.

4 Right Whale
5 Bowhead Whale
6 Humpback Whale The humpback whale is a species of baleen whale. One of the larger rorqual species, adults range in length from 12–16 m and weigh about 36,000 kg.
7 Sei Whale
8 Gray Whale
9 Bryde's Whale
10 Minke Whale