Robert Schmertz (November 15, 1926 – July 24, 1975) was an American real estate developer and sports franchise owner. He was owner or part-owner of two NBA franchises; the Portland Trail Blazers from 1970 through 1972, and the Boston Celtics from 1972 until 1975. He also owned the New England Whalers of the World Hockey Association, and the New York Stars of the now-defunct World Football League. Schmertz also founded Leisure Technology, a developer of retirement communities.