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 (Lemoine Point), an airport, and areas of agricultural land. A marina is situated on the bay itself. To the east is a large federal penitentiary, Collins Bay Institution.
Collins Bay was named after the original surveyor of the region, John Collins.