International 420 Class Association




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One-Design Class Type: Dinghy

Was this boat built to be sailed by youth or adults? Youth

Approximately how many class members do you have? 150 in the US.

About International 420 Class Association

The US International 420 Class Association is dedicated to the support, development and growth of International 420 Class sailors in the United The International 420 is an established performance two-person trapeze and spinnaker racing dinghy. The I420 is a youth development boat in 43 countries and is the boat used for the two-person boys dinghy, and two-person girls dinghy events at the Youth Sailing World Championships, the pinnacle youth sailing event in the world. In the US the boat is used in the US Sailing Youth Championship, the pinnacle youth sailing event in the US.
The I420 is sailed at yacht clubs, open, national and international levels. There are many second hand boats available, and active fleets across the United States. The 2018 World Championship was held in Newport, RI with 500 sailors from over 25 counties attending.

Designed by Christian Maury in France in 1960, the I420 celebrated its 60th Anniversary in 2020.
The I420 is recognized by World Sailing as an “World Sailing Learn to Sail Training Program Recommended Boat”, which endorses its use by Member National Authorities for developing and teaching sailing. All boats recognised by World Sailing have been independently assessed by World Sailing to be ideal for developing and/or teaching sailing within the World Sailing Learn to Sail programme.
The class is managed at a global level by the International 420 Class Association, and by the local class association in each country. In the US that is the US I420 Class Association.


Boats Produced: 26,000

Class boat builder(s):

Full list at:

Approximately how many boats are in the USA/North America? 150

Where is your One-Design class typically sailed in the USA? List regions of the country:

New England (Newport, CT, NYC, NJ), Annapolis, Miami, Houston, San Francisco & Southern Califorina.

Does this class have a spinnaker or gennaker? Yes

Ideal combined weight of range of crew:  250 – 325 lbs

Boat Designed in 1960

Beam: 5′ 4″

Weight of rigged boat without sails: 100 kg/220 lbs (80kg/176 lbs Bare Hull)


Mast Height: 20′ 6″