15th Cavalry may refer to:
Divisions 15th Cavalry Division (Russian Empire) 15th Cavalry Division (Soviet Union) 15th Cavalry Division (United States)
Brigades 15th (Imperial Service) Cavalry Brigade 15th Mounted Brigade
Regiments 15th Cavalry Regiment (United States) 15th Lancers 15th Lancers (Cureton's Multanis) 15th The King's Hussars XV Corps Cavalry Regiment Royal German Cavalry Regiment, also known as the 15th Cavalry Regiment
American Civil War regiments Union Army 15th Illinois Cavalry Regiment 15th Kansas Cavalry Regiment 15th Kentucky Cavalry Regiment 15th Pennsylvania Cavalry Regiment
Confederate Army 15th Confederate Cavalry Regiment 15th Texas Cavalry Regiment 15th Virginia Cavalry Regiment
Battalions and companies 15th (Hampshire Carabiniers) Battalion, Hampshire Regiment 15th (Suffolk Yeomanry) Battalion, Suffolk Regiment 15th (Northumberland) Company, Imperial Yeomanry
See also 15th Division (disambiguation) 15th Brigade (disambiguation) 15th Regiment (disambiguation) 15th (disambiguation)