The number one in the world made nine birdies and one eagle. But missed 59 historic chances with a double bogey on the 18th hole to sit 13 under overall.
Denmark’s Nanna Koerstz Madsen and Emily Kristine Pedersen were second with India’s Aditi Ashok.
Britain’s Jodi Ewart Shadoff was on par while Mel Reid finished sixth.
Sweden’s Madelene Sagstrom led five games from eight-under par, while South Korea’s Inbee Park, gold medalist at the Rio 2016 Olympics, is 10 strokes behind Korda.
If Korda, the reigning women’s PGA champion, birdies on the 18th hole and doesn’t drop two shots. She should equal Annika Sorenstam’s (2001) one-round score of 59 on the LPGA Tour.
Sorenstam remains the only female golfer to break a phenomenal 60 record in golf.
Nelly Korda maintains her focused demeanor throughout what seems like a historic cycle. and insisted that she wasn’t particularly pressuring herself to win an Olympic gold medal.