Frontenac County, Ontario

Frontenac County is an administrative county (upper-tier municipality) and ceremonial county of the Canadian province of Ontario, located in the southeast of the province. Its county seat and most populous city is Kingston, which in December 2020 was home to an estimated population of 370,600, almost a quarter of Frontenac County's population of approximately 505,300. Outside of the urban are of Kingston's city proper, Frontenac county consists primarily of Kingston's modest metropolitan area and some rural areas including farmland and their hamlets and smaller towns and villages.

Frontenac County was served by its own police service (the Frontenac Constabulary) until 1988; since 1988, the county contracts all local policing services, at both the upper- and lower-tier levels of local government, from the Ontario Provincial Police (OPP). Kingston is home to one of the major regional operational headquarters of the OPP, and just south of the Kingston city proper in the lower-tier municipality of Bedford, part of Kingston's metropolitan area, is the Kingston Institution, the largest maximum-security prisom in Canada, administeted by Corrections Canada of the federal government.