The 2003 Trinity Bantams football team was an American football team that represented Trinity College of Hartford, Connecticut as a member of the New England Small College Athletic Conference (NESCAC) during the 2003 NCAA Division III football season. In their fifth season under head coach Chuck Priore, the Bantams compiled a perfect 8–0 record and won the NESCAC championship. Trinity's defense allowed only 3.8 points per game, setting a new NESCAC record for scoring defense.
The 2003 season was Trinity's second consecutive NESCAC championship and part of a 31-game winning streak that began on October 5, 2002, ended on September 30, 2006, and included perfect seasons in 2003, 2004, and 2005.
The team played its home games at Jessee/Miller Field in Hartford.