The Johnson 18 is an 18-foot (5.5 m) sailing dinghy designed by Rodger Martin.
Although it is no longer produced, Johnson Boat Works fabricated over 100 of these sport boats before closing its doors in 1998.

Johnson Boat Works had built mostly scow designs on White Bear Lake, Minnesota since its founding in 1896. However in 1994 Rodger Martin Yacht Designs was hired to finalize the Johnson 18 design concept. 75 Johnson 18's were built in the first year and a half of production. The nationwide dealer distribution of this boat was a departure from the normal direct sales of the Johnson Boat Works.

As a result Johnson 18's are located all over the United States, though fleet sizes remain relatively low. In 1998 Johnson Boat Works was sold and its assets were divided. Melges Boat Works took control of most scow molds, while Catalina Yachts bought the Johnson 18 molds as well as several un-finished Johnson 18 hulls and fittings. No Johnson 18's were produced after the sale and Catalina Yachts retains control of the class molds. Wikipedia - Johnson 18