Rajasimha II, also known as Rajasingha II (pre coronation, Prince Mahastana), is a Sinhalese King, reigned 1629 – December 6, 1687; third king of the kingdom of Kandy in Sri Lanka.

Rajasingha requests Dutch aid to help expel the Portuguese from the island, which they successfully do in 1656.

By this time, however, it has become clear to the Kandyans that the Dutch not only intend to expel the Portuguese but to replace them as the major colonial power on the island, and from 1645 onwards Rajasingha is engaged in sporadic warfare with his erstwhile allies.