2009 Ontario New Democratic Party leadership election
March 7, 2009
| |||||||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||||
| Date | March 6–8, 2009 |
|---|---|
| Convention | Copps Coliseum, Hamilton, Ontario |
| Resigning leader | Howard Hampton |
| Won by | Andrea Horwath |
| Ballots | 3 |
| Candidates | 4 |
| Entrance fee | $10,000 (plus a $5,000 refundable deposit) |
| Spending limit | $500,000 |
The 2009 Ontario New Democratic Party leadership election was held in Hamilton, from March 6 to 8, 2009 to elect a successor to Howard Hampton as leader of the Ontario New Democratic Party (NDP). On June 15, 2008, Hampton informed the party's provincial council that he would not stand for re-election as leader at the next party convention in a year's time. While a leadership vote was held at each biennial convention of the Ontario NDP until and including the last regular convention in 2007, there is normally not a contested vote unless there is a vacancy, therefore, the 2009 vote was the party's first leadership convention since Hampton was elected in 1996 to succeed Bob Rae.
With the support of high-profile party members such as the left-wing MPP Peter Kormos and Sid Ryan, the President of CUPE Ontario, Andrea Horwath, the MPP for Hamilton Centre, won the leadership contest with 60.4% of the vote on the final ballot. As of 2022, it remains the last leadership election held by the Ontario New Democratic Party.