223rd may refer to:
United Kingdom 223rd Brigade (United Kingdom), a Home Defence formation of the British Army during the First World War 223rd Independent Infantry Brigade (Home), a Home Defence formation of the British Army during the Second World War 223rd Brigade Royal Field Artillery 223rd (Banffshire) Medium Battery, Royal Artillery 223rd (Devon) Field Battery, Royal Artillery 223rd (2nd London) Field Park Company, Royal Engineers
United States 223rd Military Intelligence Battalion (United States), California Army National Guard; provides interpreters, translators, counter-intelligence, interrogation and signals intelligence support 223rd Cyberspace Operations Squadron, U.S. Air Force 223rd Engineer Battalion (United States), U.S. Army 223rd Aviation Regiment (United States), U.S. Army 223rd Infantry Regiment (United States), U.S. Army
Other 223rd Battalion (Canadian Scandinavians), CEF, Canadian Army; a unit in the Canadian Expeditionary Force during the First World War 223rd Mixed Brigade (Spain), a unit of the Spanish Republican Army in the Spanish Civil War 223rd Coastal Division (Italy), World War II Royal Italian Army 223rd Infantry Division, World War II German Wehrmacht 223rd Rifle Division, World War II Soviet Red Army 223rd Flight Unit, Russian Air Force 223rd Anti-aircraft Missile Regiment (Ukraine), Ukrainian Air Force
See also
223 (disambiguation), including units "No, 223"