Mabel Antoinette Sine Wadsworth (October 14, 1910 – January 11, 2006) was an American birth control activist and women's health educator. Influenced by the work of Margaret Sanger, she organized door to door campaigns in rural Maine in the 1950s and 1960s to teach women about birth control. In the 1960s she established and directed the state's first family planning program which provided contraceptive services, and helped found the Maine Family Planning Association in 1971, serving as its first president. In 1984 she supported the establishment and naming of the Mabel Wadsworth Women's Health Center in Bangor, Maine, a private, non-profit, feminist health center. Wadsworth was in the first class of inductees to the Maine Women's Hall of Fame in March 1990.