Mary G. Hill (née Barnett; known as "Mother" Hill; March 6, 1803 – January 1884) was a 19th-century American temperance activist and social reformer as well as a religious worker. Because of her executive ability, she was esteemed and helpful in planning for the benevolent enterprises of her city. She served as president of the Ladies' Parsonage Association for twenty years, and of the first Woman's Christian Temperance Union (WCTU) of Newark, New Jersey (1874–1882), of which she became Honorary President for life. She was one of the organizers of the Female City Mission of the Methodist Episcopal church in Newark.[1]