|Born||October 11, 1919|
Fayetteville, New York, U.S.
|Died||October 29, 1992 (aged 73)|
Schenectady, New York, U.S.
|Coaching career (HC unless noted)|
|1949–1956||The Manlius School (NY)|
|1957–1958||River Dell Regional HS (NJ)|
|Head coaching record|
|Overall||51–59–3 (college football)|
|Accomplishments and honors|
|AFCA Coach of the Year (1966)|
Eddie Robinson Coach of the Year (1966)
Thomas B. Cahill (October 11, 1919 – October 29, 1992) was an American football player and coach who served as the head coach at the United States Military Academy from 1966 to 1973 and at Union College in Schenectady, New York from 1976 to 1979, compiling a career college football record of 51–59–3.
During his tenure as head coach at Army, which coincided with the height of the Vietnam War, his teams beat Navy five times. Following the 1966 season, the Eddie Robinson Coach of the Year award was bestowed upon Cahill. Following a 51–0 defeat at the hands of Navy to conclude the 1973 season, Cahill was dismissed as head coach. Cahill died on October 29, 1992 in Schenectady after a heart attack.
|Army Cadets (NCAA University Division / Division I independent) (1966–1973)|
|Union Dutchmen (New England Small College Athletic Conference) (1976)|
|Union Dutchmen (NCAA Division III independent) (1977–1979)|