North Frontenac is a township in Frontenac County in eastern Ontario, Canada. North Frontenac was created in 1998 by the amalgamation …North Frontenac is a township in Frontenac County in eastern Ontario, Canada. North Frontenac was created in 1998 by the amalgamation of three municipalities: the Township of Barrie; the Township of Clarendon and Miller; and the Township of Palmerston, North and South Canonto.