The Nonsuch 30 is a Canadian sailboat that was designed by Mark Ellis and first built in 1978. It was the first the series of Nonsuch sailboats and was scaled upwards and down, to form a complete line of boats, from the Nonsuch 22 to the Nonsuch 40. The Nonsuch 30 hull design was used to create the 1994 Nonsuch 324, which features a carbon fibre wishbone boom, more sail area and a wing keel.