Ally Ewing née McDonald (born October 25, 1992) is an American professional golfer and plays on the LPGA Tour.
McDonald was born in Tupelo, Mississippi and grew up in Fulton, Mississippi. She played college golf at Mississippi State University where she won five events. She also won the Mississippi State Amateur twice and the North and South Women's Amateur. She played on the winning U.S. teams in the 2013 Spirit International Amateur Golf Championship and the 2014 Curtis Cup.
McDonald turned professional after graduating from college in 2015.