The Com-Pac Sunday Cat is an American trailerable sailboat that was designed by Clark Mills, who had previously designed the Optimist.

Com-Pac Yachts is an American brand of sailboats, made by the Hutchins Co., Inc., a boat builder based in Clearwater, Florida. The company specializes in the design and manufacture of fiberglass sailboats. Over time the brand and the company have become synonymous.