Martha Logan is a fictional character played by Jean Smart in the television series 24. As a first lady of the United States within the 24 universe, she is the capable yet mercurial wife of President Charles Logan. Critics praised Martha Logan as the breakout character of the show's 2005-2006 season.

Jean Elizabeth Smart is an American actress. After beginning her career in regional theater in the Pacific Northwest, she appeared on Broadway in 1981 as Marlene Dietrich in the biographical play Piaf. Smart was later cast in a leading role as Charlene Frazier Stillfield on the CBS sitcom Designing Women, in which she starred from 1986 to 1991.