| Attorney General of Ontario | |
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| Executive Council of Ontario | |
| Style | The Honourable |
| Term length | At His Majesty’s Pleasure |
| Inaugural holder | John Sandfield Macdonald as Attorney General of Ontario |
| Website | Office of the Attorney General |
The Attorney General of Ontario is the chief legal adviser to His Majesty the King in Right of Ontario and, by extension, the Government of Ontario. The Attorney General is a senior member of the Executive Council of Ontario (the cabinet) and oversees the Ministry of the Attorney General – the department responsible for the oversight of the justice system in the province of Ontario. The Attorney General is an elected Member of Provincial Parliament who is appointed by the Lieutenant Governor of Ontario on the constitutional advice of the Premier of Ontario. The Ministry is the largest justice system in Canada and one of the largest in North America.
Doug Downey was appointed Attorney General of Ontario on 20 June 2019, replacing Caroline Mulroney.