The Ontario Provincial Police (OPP) is the provincial police service of Ontario, Canada. The OPP patrols provincial highways and waterways; protects provincial government buildings and officials, with the exception of the legislative precinct; patrols unincorporated areas in northern Ontario; provides training, operational support, and funding to some Indigenous police forces; and investigates complex or multi-jurisdictional crimes across the province. The OPP also has a number of local mandates through contracts with municipal governments and First Nations, where it acts as the local police force and provides front-line services.
With an annual budget of nearly $1.4 billion, the OPP employed more than 6,100 uniformed officers, 500 auxiliary officers, and 2,800 civilian employees in 2023, making it the largest police service in Ontario and the second-largest in Canada (after the Royal Canadian Mounted Police). The OPP's operations are directed by its commissioner (Thomas Carrique) and it is a division of the Ministry of the Solicitor General.