Fifth Army

Fifth Army may refer to:

Germany

 * 5th Army (German Empire), a World War I field Army
 * 5th Army (Wehrmacht), a World War II field army
 * 5th Panzer Army
 * 5th Army (GDR), a Warsaw Pact field army in the Cold War to be activated in case of a war with NATO

Russia/USSR

 * 5th Army (Russian Empire)
 * 5th Army (RSFSR)
 * 5th Army (Soviet Union)
 * 5th Combined Arms Army (Russian Federation)

Others

 * 5th Army (Austria-Hungary)
 * Fifth Army (Bulgaria)
 * Fifth Army (Nationalist China), see 88th Division (National Revolutionary Army)
 * Fifth Army (France)
 * Fifth Army (Japan)
 * Fifth Army (Ottoman Empire)
 * Fifth Army (United Kingdom)
 * Fifth United States Army
 * Fifth Army (Italy)
 * 5th Army (Kingdom of Yugoslavia)
 * Special Frontier Force of India, during the Indo-Pakistani War of 1971