King's Highway 15, commonly referred to as Highway 15, is a provincially maintained highway in the Canadian province of Ontario. It travels north from an interchange with Highway 401 in Kingston to Highway 7 in Carleton Place, a distance of 114.7 kilometres (71.3 mi). In addition to Kingston and Carleton Place, the highway provides access to the Eastern Ontario communities of Joyceville, Seeley's Bay, Morton, Elgin, Crosby, Portland, Lombardy and Franktown. Prior to 1998, Highway 15 continued north from Carleton Place, passed Almonte and through Pakenham, to Highway 17 in Arnprior.