The 2009 Louisiana Tech Bulldogs football team represented Louisiana Tech University as a member of the Western Athletic Conference (WAC) during the 2009 NCAA Division I FBS football season. Led by third-year head coach Derek Dooley, the Bulldogs played their home games at Joe Aillet Stadium in Ruston, Louisiana. Louisiana Tech finished the season with a record of 4–8 overall and a mark of 3–5 in conference play, tying for fifth place in the WAC.