The C&C 27 Mk V, or Mark V, is a Canadian sailboat, designed by the C&C Design Group led by Neil Gilbert and first built in 1984. Despite its name, the C&C 27 Mk V was a new design, unrelated to the original C&C 27. The design was originally marketed by the manufacturer as the "new C&C 27", but is now usually referred to as the Mark V to differentiate it from the earlier C&C 27 Mark I, II, III and IV designs. The C&C 26 Wave is a sailboat derived from the C&C 27 Mk V, but with a wing keel and shorter mast.