The Interlake is an American planing sailing dinghy that was designed by Francis Sweisguth in 1932, as a one-design racer and first built in 1933.

[1][3][4] In 2023, licensing to build Interlakes was assumed by Beacon Composites in Creedmoor, North Carolina.

[6] The Interlake is a recreational sailboat, originally built predominantly of wood, fiberglass construction has been allowed by the class rules since 1955.

[1][3] The boat has a draft of 4.58 ft (1.40 m) with the centerboard extended and 8 in (20 cm) with it retracted, allowing beaching or ground transportation on a trailer.

[7] In a 1994 review Richard Sherwood wrote that the "Interlake was designed for Sandusky Bay, Ohio, known for its short chop.