Sallie Flournoy Moore Chapin (March 30, 1830 - April 19, 1896) was an American author and temperance worker.
Sarah ("Sallie") Flournoy Moore was born on March 30, 1830, in Charleston, South Carolina. Her maternal ancestors, Elizabeth Martha Vigneron Simons, were Huguenots, who came to the Colonies in 1685 and settled in Rhode Island. Her two great-grandfathers, Vigneron and Tousager, were killed in the Revolutionary War. On her father's side, George Washington Moore, the origins were Scots from Northern Ireland. Her father was a Methodist minister of independent means but lost his home in Charleston fire of 1838, and he moved to the northern part of the State. Moore's father died in the pulpit at a union camp meeting, during the Civil War, after receiving a dispatch announcing the death of his son in a battle. 
Sallie Moore's sister, Georgia, was a writer and married Felix G. De Fontaine, a South Carolina journalist. 
From early childhood she showed a fondness and talent for authorship. Chapin wrote much, but she published only one book, Fitzhugh St. Clair, the South Carolina Rebel Boy; or, It Is No Crime to Be Born a Gentleman (1872), dedicated to the children of the Confederacy. 
The war broke her family fortune: Leonard Chapin enlisted in the Fifth South Carolina Cavalry in 1861 and he served until October 1864, when he was wounded. He died in 1879 after the conflict ended. During the Civil War Sallie Chapin was a supporter of the Confederacy; she was president of the Soldiers' Relief Society and of the Ladies' Auxiliary Christian Association and worked day and night in the hospitals. 
After attending a convention at Ocean Grove, New Jersey, in 1880, Chapin became involved in the Woman's Christian Temperance Union. In 1880 she organized the Charleston Woman's Christian Temperance Union, the first in the state and served as first State president elected in 1883, and she did much to extend that order in the South, where conservatism hindered the work for a long time. In 1881 she attended the convention in Washington, D. C., where she made a brilliant reply to the address of welcome on behalf of the South, ending with a telling poem setting forth the intentions of the Woman's Christian Temperance Union. 
She believed in prohibition as the remedy for intemperance. She was a forcible and brilliant writer and conversationalist. In the Chicago Woman's Christian Temperance Union convention, in 1882, when the Prohibition Home Protection Party was formed, she was made a member of the executive committee, and by pen and voice she popularized that movement in the South. She was at one time president of the Woman's Press Association of the South. 
In 1888 she campaigned to open a State Industrial School for Girls in South Carolina; her effort led to the opening of the South Carolina Industrial and Winthrop Normal College, later Winthrop University. 
In 1895, already burdened by a failing health, Chapin sent a petition to the State Constitutional Convention to raise the statutory age of consent for women to eighteen years (it was at the time set to ten years). The new constitution raised the age of consent to sixteen years. 
On August 12, 1847, Sallie Moore married Leonard Chapin while she was still a girl, and her married life was singularly happy. Her husband, of a prominent family of Springfield, Massachusetts, was one of the founders of YMCA of Charleston, and one of its chief officers for years. 
The Chapins adopted Elizabeth Vigneron, the daughter of Sallie Chapin's brother, James O.A. Moore. They also adopted George Mendenhall Chapin; George & Son, edited by Nancy Lu Wilson Rose in 2009, are the letters, poetry and diary of George Mendenhall Chapin and describes the difficult relationship with his adoptive mother, Sallie Chapin. George's son, Thurston Adger Wilson, was to become a leading figure in the North Carolina labor movement of the 1920s and 1930s. 
The National Woman's Christian Temperance Union erected a granite monument over her grave at Magnolia Cemetery and in 1904 a drinking fountain at a busy intersection in Charleston was set up in her memory. 
- Willard, Frances Elizabeth, 1839-1898; Livermore, Mary Ashton Rice, 1820-1905 (1893). A woman of the century; fourteen hundred-seventy biographical sketches accompanied by portraits of leading American women in all walks of life. Buffalo, N.Y., Moulton. p. 168. Retrieved 8 August 2017. This article incorporates text from this source, which is in the public domain.
- Notable American Women, 1607–1950: A Biographical Dictionary. Harvard University Press. 1971. p. 321. Retrieved 10 September 2017.
- Rose, Nancy Lu Wilson (2009). George & Son. Dog Ear Publishing. ISBN 9781608441174. Retrieved 10 September 2017.