Seth Stammler (born September 29, 1981 in Columbus, Ohio) is an American soccer player who currently plays for New York Red Bulls in Major League Soccer.

Stammler attended Gahanna Middle School East and Gahanna Lincoln High School, and played four years of college soccer at the University of Maryland, captaining the team in his sophomore, junior, and senior seasons.

Stammler was selected 18th overall in the 2004 MLS SuperDraft by the MetroStars. However, during preseason, Stammler suffered an ankle injury that kept him out for much of the season. Joining the squad late in the year, Stammler registered only a minute of playing time as a rookie. He saw more playing time in his second season, and played effectively in left midfield in the playoffs.