Law enforcement in Canada is the responsibility of police services, special constabularies, and civil law enforcement agencies, which are operated by every level of government, some private and Crown corporations, and First Nations. In contrast to the United States or Mexico, and with the exception of the Unité permanente anticorruption in Quebec and the Organized Crime Agency of British Columbia, there are no organizations dedicated exclusively to the investigation of criminal activity in Canada. Criminal investigations are instead conducted by police services, which maintain specialized criminal investigation units in addition to their mandate for emergency response and general community safety.

Calgary Police Service (CPS) is the municipal police service of the City of Calgary, Alberta, Canada. It is the largest municipal police service in Alberta and third largest municipal force in Canada behind the Toronto Police Service and the Montreal Police Service.