In military terms, 55th Division or 55th Infantry Division may refer to:
; Infantry divisions :
- 55th Infantry Division (Bangladesh)
- British 55th Division:
- 55th (West Lancashire) Division (1908-1920)
- 55th (West Lancashire) Infantry Division (1921-1945)
- 55th Infantry Division (France)
- 55th Infantry Division Savona (Kingdom of Italy)
- 55th Division (Imperial Japanese Army)
- 55th Infantry Division (Poland)
- 55th Naval Infantry Division (Russia)
- Soviet 55th Division
- 55th Rifle Division (Soviet Union)
- 55th Guards Rifle Division
- 55th Infantry Division (United States)