224th

224th may refer to:


 * 224th (Parachute) Field Ambulance, a Royal Army Medical Corps unit of the British airborne forces during the Second World War
 * 224th Battalion, CEF, a unit in the Canadian Expeditionary Force during the First World War
 * 224th Joint Communications Support Squadron (JCSS), provides deployable tactical communications for JTF and JSOTF Headquarters
 * 224th Sustainment Brigade (United States), a sustainment brigade of the United States Army and the California Army National Guard