Elizabeth "Jean" Guy (September 8, 1922 – July 5, 2013) was an American First Lady of the U.S. state of North Dakota. The longest serving First Lady in North Dakota's history, she served from 1961 to 1973 during the tenure of her husband, former Governor William L. Guy, the longest-serving governor in the state's history. Described as a highly influential behind the scenes, Jean Guy has been credited with persuading William Guy to run for office, reviving the Democratic Party and the North Dakota Democratic-Nonpartisan League Party in the state during the mid-20th Century.