Seth Stubblefield (born July 21, 1993) is an American retired competitive swimmer who specialized in sprint freestyle and butterfly.

[3][4] Swimming as a sophomore for Plano Senior High School at the 2009 5A Texas State Championships, Stubblefield won the 4×50 and the 4×100 y freestyle relays.

In the 4×50 y medley relay, Stubblefield teamed up with high school and club teammate Will Licon to earn a bronze medal.

At the 2016 U.S. Olympic Trials, Stubblefield entered the 100-meter butterfly final as the top-seeded swimmer, ahead of the likes of Michael Phelps and Tom Shields.

[14][15] Seth is married to former University of Georgia All-American swimmer Lauren (Harrington) Stubblefield, and they have a son together named Judah.