Arvind Kejriwal said Chief Ministerial candidate was Bhagwant Singh Mann, a decision that he said was based on a phone-in survey conducted by AAP among its supporters.
Arvind Kejriwal's Aam Admi Party, in its second attempt, has taken Punjab, giving the eight-year-old outfit its second state after Delhi.
Opposition leaders said that Punjab's security would be compromised if AAP was given charge of the state.
The scale of AAP's victory encourages the party to claim Arvind Kejriwal should be the leader of an anti-BJP league for the next general election in two years.