203rd

203rd may refer to:

203rd Battalion (Winnipeg Rifles), CEF, a unit in the Canadian Expeditionary Force during the First World War 203rd General Hospital, activated in 1941 to meet anticipated military medical needs of a country preparing for war 203rd (2nd North Wales) Brigade, a formation of the British Army during World War I

See also 203 (number) 203, the year 203 (CCIII) of the Julian calendar