Jean-Francois Lisée has been elected leader of the Parti Quebecois.
Lisée won on the second round of voting and beat out fellow members of the legislature Alexandre Cloutier and Martine Ouellet and the unelected Paul St-Pierre Plamondon.
Lisée has been a member of the legislature since 2012.
The voting began Wednesday and ended Friday.
About 75 per cent of the more than 70,000 members eligible to vote ended up casting a ballot.
Lisée, 58, has a law degree and a master's in communications from Universite du Quebec a Montreal.
He served as international relations minister between 2012 and 2014 and served as advisers to former premiers Jacques Parizeau and Lucien Bouchard in the 1990s.
Lisée has promised to not hold a sovereignty referendum in his first mandate if he is elected premier in the 2018 election.
His campaign focused on immigration and identity issues and raised the ire of opponents and younger voters who saw him playing on fears and divisions in society.
He argued immigration has not been a great benefit to Quebec and that the province needs to reduce the number of immigrants it accepts every year in order to better integrate them.