33rd Regiment may refer to:
Infantry regiments 33rd Regiment (Vietnam People's Army), a unit of the PAVN 33rd Punjabis, an infantry regiment of the British Indian Army 33rd Regiment (3rd Burma Bn.) Madras Infantry, a unit of the British Indian Army 33rd Regiment of Foot, a unit of the British Army 33rd Infantry Regiment (United States), a unit of the United States Army
Cavalry regiments 33rd Light Dragoons, a cavalry regiment of the British Army
Engineering regiments 33 Combat Engineer Regiment, a unit of the Canadian Army 33 Engineer Regiment (EOD), a unit of the British Army's Royal Engineers
Signal regiments 33 Signal Regiment (Canada), a unit of the Royal Canadian Signals Corps 33 (Lancashire and Cheshire) Signal Regiment, a unit of the British Army
Artillery regiments 33rd (St Pancras) Searchlight Regiment, Royal Artillery, a unit of the British Army 33rd Field Artillery Regiment, a unit of the United States Army
American Civil War regiments 33rd United States Colored Infantry Regiment, a unit of the Union Army 33rd Wisconsin Volunteer Infantry Regiment, a unit of the Union Army 33rd Pennsylvania Infantry, a unit of the Union Army 33rd Ohio Infantry, a unit of the Union Army 33rd New York Volunteer Infantry Regiment, a unit of the Union Army 33rd Regiment Kentucky Volunteer Infantry, a unit of the Union Army 33rd Illinois Volunteer Infantry Regiment, a unit of the Union Army 33rd Indiana Infantry Regiment, a unit of the Union Army 33rd Iowa Volunteer Infantry Regiment, a unit of the Union Army 33rd Virginia Infantry, a unit of the Confederate States Army 33rd Tennessee Infantry Regiment, a unit of the Confederate States Army 33rd Regiment Alabama Infantry, a unit of the Confederate States Army 33rd Arkansas Infantry Regiment, a unit of the Confederate States Army
See also 33rd Division (disambiguation) 33rd Brigade (disambiguation) 33 Squadron (disambiguation)