† – BCS representative as conference champion
‡ – BCS at-large representative
§ – Conference co-champions
Rankings from AP Poll
The 2005 Purdue Boilermakers football team represented Purdue University during the 2005 NCAA Division I-A football season. The team was coached by Joe Tiller and played its home games at Ross-Ade Stadium. Purdue played eleven games in the 2005 season, finishing with a 5–6 record and missing a post-season bowl game for the first time since 1996. Purdue was predicted by many as a dark horse for the Big Ten title, but after a strong 2–0 start, lost six straight before rebounding to finish a more respectable 5–6.