Collins Bay is a bay and natural harbour, as well as a community, within the western part of the municipality of Kingston, Ontario, Canada. Collins Bay was at one time a small village, but it became absorbed by the city of Kingston. Now Collins Bay consists mostly of residential subdivisions, a large conservation area, Kingston Norman Rogers Airport, and areas of agricultural land. The Collins Bay marina is situated on the bay itself. To the east is a large federal penitentiary, Collins Bay Institution.