William Dayton Orr (March 15, 1935 – May 5, 2013) was an American insurance executive and author. The husband of former Nebraska Governor Kay A. Orr, he served as the state's first and only First Gentleman to date from 1987 to 1991. Orr's position as a state First Gentleman, an unusual political occupation for a man at the time, earned him national attention. In 1989, Orr published a popular cookbook, the First Gentleman's Cookbook, which sold thousands of copies nationwide. Orr's cookbook included recipes contributed by Nancy Reagan, Warren Buffett, Johnny Carson, and Katharine Hepburn.