joseph lister hill (december 29, 1894 – december 20, 1984) was an american politician. a member of the democratic party, he represented alabama in the u.s. congress for more than forty-five years, as both a u.s. representative (1923–38) and a u.s. senator (1938–69). during his senate career he was active on health-related issues, and served as senate majority whip (1941–47). at the time of his retirement, hill was the fourth-most senior senator.