Margaret Catharine (Kate) Moore (1752–1823), later known as Kate Barry, was a heroine of the American Revolutionary War. She was daughter of Charles and Mary Moore, and the eldest of ten children. She married Andrew Barry in 1767 at the age of 15, and lived on Walnut Grove Plantation in Roebuck, South Carolina during the 18th century. Kate was instrumental in helping to warn the militia of the coming British before the Battle of Cowpens in 1781. According to legend, she tied her newborn baby to the bedpost while she rode out to warn neighbors that the British were coming.
Her warning helped to pre the colonial forces to defeat the British governor, Cornwallis and his men and drive them north, out of the state of South Carolina. She is buried in the family cemetery in Moore, South Carolina, beside her husband, Andrew, who was one of the first elders of the Nazareth Presbyterian Church.