Gisèle Halimi (born 1927) is a Tunisian lawyer, activist, and author. Born in La Goulotte , she was educated at a French lycée in Tunis and then attended the University of Paris, graduating in law and philosophy. In 1948 she qualified as a lawyer and has practised at the Paris bar since 1956. She acted as a counsel for the Algerian National Liberation Front, most notably for the tortured activist Djamila Boupacha in 1960, and wrote a book in 1961 (with an introduction by Simone de Beauvoir) to plead her case. She has also defended Basque terrorists, and has been counsel in many cases related to women's issues, such as the Bobigny abortion trial of 1972 which attracted national publicity.

In 1971 she founded the feminist group 'Choisir', to protect the women who had signed the Manifesto of the 343 admitting to having illegal abortions. In 1972 'Choisir' formed itself into a clearly reformist body, and the campaign greatly influenced the passing of the law allowing contraception and abortion carried through by Simone Veil in 1974. Halimi is the author of La Cause des femmes (The Women's Cause, 1973) and instigator and contributor to the collective work Le Programme commun des femmes (The Women's Common Cause, 1978). This outlined women's chief needs: legal, medical, educational and professional, and suggested solutions which should be decided by women voters.

In 1981 she was elected to the French National Assembly, as an Independent Socialist, and was Deputy for Isère until 1984. Since 1985 she has been French legate to UNESCO. She has been twice married, to Paul Halimi and to Charles Faux, and has three sons.