The Ministry of the Attorney General is responsible for providing a fair and accessible justice system which reflects the needs of the diverse communities it serves across government and the province. It strives to manage the justice system in an equitable, affordable and accessible way throughout the province.

The Ministry delivers and administers a wide range of justice services including:

1. administering approximately 115 statutes;
2. conducting criminal proceedings throughout Ontario;
3. providing legal advice to, and conducting litigation on behalf of, all government ministries and many agencies, boards and tribunals;
4. providing advice on, and drafting, all legislation and regulations; and
5. coordinating and administering court services throughout Ontario.

The Office of the Public Guardian and Trustee, the Children's Lawyer (formerly called the Official Guardian), and the Special Investigations Unit (SIU) all fall within MAG's responsibilities. The Ministry also funds Legal Aid Ontario which is administered by an independent Board.