The International 210 is an American sailboat that was designed by Fenwick Williams under the supervision of C. Raymond Hunt as a one design racer a cruiser and first built in 1946. The International 210 is a development of the smaller 1939 International 110. Unlike commonly used sailboat nomenclature, the 210's designation does not refer to its length overall or waterline length, but indicates it is the next in a series of boats that started with the 110.