Mary "Mollie" Garrett Hay (August 29, 1857 – August 29, 1928) was an American suffragist, community organizer, and president of the Women's City Club of New York, the Woman Suffrage Party and the New York Equal Suffrage League. Hay was known for creating woman's suffrage groups across the country. She was also close to the notable suffragist, Carrie Chapman Catt, with one contemporary, Rachel Foster Avery, stating that Hay "really loves" Catt.