Stephen Edward Smith (September 24, 1927 – August 19, 1990) was the husband of Jean Ann Kennedy.

He was a financial analyst and political strategist in the 1960 United States presidential campaign of his brother-in-law John F.

After his father-in-law Joseph P. Kennedy Sr. suffered a stroke on December 19, 1961, Smith managed the family's fortune out of a New York City office building.

He was responsible for overseeing the trusts that benefited him and his family as well as the other children and grandchildren of Joe and Rose Kennedy.

Stephen and Jean had two biological sons and later adopted two daughters: A longtime smoker, Smith died from lung cancer at his home in Manhattan on August 19, 1990, at age 62.