The C&C 121, originally called the 121 Express at introduction, is an American sailboat, that was designed by Tim Jackett and entered production in 1999. ^{[1] [2] [3] [4]}

The boat was built by C&C Yachts in the United States, but it is now out of production. ^{[1] [4] [5]}

The C&C 121 is a small recreational keelboat, built predominantly with a vinylester-corecell and E-glass with Kevlar. It has a masthead sloop rig, an internally-mounted spade-type rudder and a fixed fin keel. It displaces 14,600 lb (6,622 kg). ^{[1] [2] [4]}

The design had a choice of keels. There was an option of a standard keel with a draft of 6.50 ft (1.98 m) and 6,000 lb (2,722 kg) of lead ballast, a shallow draft keel with a draft of 6.00 ft (1.83 m) and 6,200 lb (2,812 kg) of lead ballast and a deep keel with a draft of 8.00 ft (2.44 m) and 5,500 lb (2,495 kg) of lead ballast. ^{[1] [4]}

The boat is fitted with a Volvo MD 2040 diesel inboard engine. Its fuel tank holds 35 U.S. gallons (130 L; 29 imp gal) and the fresh water tank has a capacity of 80 U.S. gallons (300 L; 67 imp gal). ^{[1] [4]}

The boat has a PHRF racing average handicap of 63 with a high of 69 and low of 54. It has a hull speed of 7.98 kn (14.78 km/h). ^{[2] [4]}

• List of sailing boat types