Winnifred Harper Cooley (October 2, 1874 – October 20, 1967) was a U.S. author and lecturer. Born in Terre Haute, Indiana, she was the daughter of Ida Husted Harper. In her 1904 publication, The New Womanhood, she advocated the feminist ideal of the New Woman. She also wrote I Knew Them When ...! published in 1940.