Annie Turner Wittenmyer (August 26, 1827 – February 2, 1900) was an American charitable organization leader, known for social reform, relief work, and her writing.

When the American Civil War began in April 1861 and reports of suffering soldiers reached the home front, she responded by traveling to military hospitals and describing the horrible conditions she witnessed prompting local support.

When the Keokuk Ladies' Soldiers' Aid Society began in May 1861, she became its "Corresponding Secretary" with the responsibility to maintain contact with sister organizations around the state.

After she encountered public and prolonged disagreements between the Keokuk Ladies Aid Society and the Iowa Army Sanitary Commission, she resigned her local relief work in 1864 to work with the United States Christian Commission in developing their special diet kitchens for Civil War hospitals.

Mary and Amanda Shelton and other "lady managers" created diet kitchens in a number of hospitals, not without encountering considerable resistance.

[11] Wittenmyer died of an asthma attack in Pottstown, Pennsylvania following a lecture and was buried in Sanatoga, Montgomery County.