Susan Hammond Barney (née , Hammond; November 24, 1834 – April 29, 1922) was an American social activist and evangelist. She was the founder of the Prisoners' Aid Society of Rhode Island, and due to her efforts, police matrons were secured for the station houses of large cities. She worked with the Woman's Foreign Missionary Society, and was the first president of the Rhode Island Woman's Christian Temperance Union (WCTU). She was instrumental in making prohibition a constitutional enactment in Rhode Island in 1886. Barney is best remembered as the WCTU's National Superintendent of Prison, Jail, Police, and Almshouse Visitation. Her wide sympathies and ministries earned her the title of "The Prisoner's Friend." It was Barney's desire to become a foreign Christian missionary, but, due to il