Stacy Lewis (born February 16, 1985) is an American professional golfer on the U.S.-based LPGA Tour.

Lewis was a decorated amateur and a four-time All-American at the University of Arkansas. Suffering from scoliosis, which was diagnosed at age 11 and treated by a spinal fusion when she was in high school, Lewis missed her first collegiate golf season recovering from the surgery. Playing her first season in 2005, she won the Southeastern Conference Tournament and was named SEC Freshman Golfer of the Year. In 2006, she won the Women's Western Amateur.

In her 2007 season, though a back injury kept her out of the SEC Tournament, Lewis won the NCAA Division I Championship and was selected Golf Digest Amateur of the Year. She also received the National Golf Coaches Association Dinah Shore Trophy. Following the college season, she won the 92nd Women's Southern Amateur and finished second in individual play in leading the U.S. team to a victory at the Copa de las Americas.