233rd or 233d may refer to:
233d Aero Squadron, Re-designated as Squadron "E", July–November 1918 233rd (Northumbrian) Field Company, Royal Engineers, moved back into the Ypres Salient in December 1915 233rd Battalion (Canadiens-Français du Nord-Ouest), CEF, unit in the Canadian Expeditionary Force during the First World War 233rd Brigade, Royal Field Artillery, part-time unit of Britain's Royal Field Artillery created in 1908 as part of the Territorial Force 233rd Brigade (United Kingdom), infantry formation of the British Army in World War I and World War II 233rd pope (Pope Paul V) (1550–1621), born Camillo Borghese, was Pope from 16 May 1605 to his death in 1621 233rd Reserve Panzer Division (Wehrmacht), German panzer division during World War II which was mainly deployed in Denmark 233rd Street (IRT White Plains Road Line), local station on the IRT White Plains Road Line of the New York City Subway East 233rd Street (Bronx), major thoroughfare in the New York City borough of The Bronx East 233rd Street station or Woodlawn station (Metro-North), commuter rail stop on the Metro-North Railroad's Harlem Line
See also 233 (number) 233, the year 233 (CCXXXIII) of the Julian calendar 233 BC