Francis Townley Haas (born December 13, 1996) is a retired American competitive swimmer who specialized in freestyle events.

[6] In College, Haas swam for Hall of Fame Coaches Eddie Reese, and Kris Kubik at the University of Texas.

[10] On the first day of the 2016 NCAA Division I Men's Swimming and Diving Championships in his freshman season, Haas won the 4×200-yard freestyle relay for the Longhorns alongside teammates Jack Conger, Clark Smith, and Joseph Schooling, setting a new U.S. Open record with Haas swimming the fastest relay split ever for a 200-yard freestyle in 1:30.52.

[3] Following his title in the 500, Haas set a new precedent in the 200-yard freestyle by becoming the first man to ever break the 1:31.00 barrier in a new NCAA, American, and U.S. Open record time of 1:30.46.

In the 500 free, Haas wasn't able to defend his title and finished second behind teammate Clark Smith, swimming a personal best time of 4:08.92.

Swimming the second leg of the 4 × 200 m free relay, Haas split 1:44.58 to pick up a bronze medal behind Great Britain and Russia.

Earlier in the race, Blake Pieroni broke Haas' American record in the 200 y free while leading off the Indiana Hoosiers' relay.

On the second day of competition, Haas competed in the 4 × 200 m freestyle relay alongside Andrew Seliskar, Blake Pieroni, and Zach Apple.

Swimming the anchor leg of the 800 free relay, Haas split 1:29.66 to give the Longhorns the victory as well as a new NCAA, American, and U.S. Open record time of 6:05.08.

While looking to make a clean sweep of 200 freestyles at the NCAAs and retake his American record, Haas eventually finished a distant 4th place in 1:31.80, well off his personal best time.

[3] In 2019 he was a member of the inaugural International Swimming League representing the Cali Condors, who finished third place in the final match in Las Vegas, Nevada in December.