There are 2 main types of whales (baleen and toothed whales). With toothed whales, some of these whales are classed as dolphins such as killer whales so the total only include the population of named whales classed as a toothed whale like killer whales.
The global population is between 1.5 Million and 2.55 Million. Reasons for the huge range is that some whales and killer whales haven't got a well known population and they are either unknown or there is no conclusive data of their populating.
The population of Orca or Killer Whale is somewhere around 50,000.
qasd
Their population is around 1.7 Million.
2
populations.com
25,000-30,000
The blue whale is the one type of whale that has the lowest population. Blue whales are nearly extincted. There are now fewer than 5,000 blue whales, one for every 8,500 cubic miles of their ocean habitat.
over-killing for whale products
The whale population has decreased dramatically from the time in which whaling was a popular industry to the present. Whale oil is not used often today because whales are being protected.
qasd
The Gray Whale is distributed in a eastern North Pacific (American) population and a critically endangered western North Pacific (Asian) population. A third population in the North Atlantic became extinct in the 18th century.
Their population number is between 10,000 and 25,000.