In military terms, 15th Division or 15th Infantry Division may refer to:

Infantry divisions

  • 15th Infantry Division (Belgium)
  • 15th Infantry Division (France)
  • 15th Motorized Infantry Division (France)
  • 15th Division (German Empire), a unit of the Prussian/German Army, later 15th Infantry Division
  • 15th Landwehr Division (German Empire)
  • 15th Reserve Division (German Empire), a unit of the Imperial German Army in World War I
  • 15th Infantry Division (Wehrmacht), formed on 1 October 1934 in Würzburg under the cover name Artillerieführer V
  • 15th Panzergrenadier Division (Wehrmacht)
  • 15th Infantry Division (South Korea)
  • 15th Infantry Division (Greece), (Greek: XV Μεραρχία Πεζικού (XV ΜΠ); XV Merarchía Pezikoú), an infantry division of the Hellenic Army
  • 15th Waffen Grenadier Division of the SS (1st Latvian), an Infantry Division of the Waffen SS during World War II
  • 15th Division (Imperial Japanese Army), an infantry division in the Imperial Japanese Army
  • 15th Infantry Division (India), British Indian Army during World War I
  • 15th Infantry Division (Iraq)
  • 15th Infantry Division Bergamo (Italy)
  • 15th Division (North Korea), a military formation of the Korean People's Army during the 20th Century
  • 15th Infantry Division (Philippines)
  • 15th Infantry Division (Poland), a unit of the Polish Army in the interbellum period
  • 15th Infantry Division (Thailand)
  • 15th (Scottish) Division, an infantry division of the British Army that fought in the First World War
  • 15th (Scottish) Infantry Division, an infantry division of the British Army that fought in the Second World War
  • 15th Infantry Division (United States)
  • 15th Rifle Division (Soviet Union), a military formation of the Red Army active during the Russian Civil War and World War II
  • 15th Special Forces Division, Syria

Cavalry divisions

  • 15th Cavalry Division (Russian Empire)
  • 15th Cavalry Division (United States), created in 1917 at Fort Sam Houston, Texas

Armored divisions

  • 15th Panzer Division (Wehrmacht)

Aviation divisions

  • 15th Fighter Aviation Division (People's Liberation Army Air Force)

Air defense divisions

  • 15th Air Defense Division (Yugoslavia)