4th Regiment

4th Regiment may refer to:


 * France
 * 4th Infantry Regiment (France)


 * Philippine Commonwealth
 * 4th Infantry Regiment (Philippine Commonwealth Army)
 * 4th Infantry Regiment (Philippine Constabulary) - The military establishment of the 4th Infantry Regiment of the Philippine Constabulary was active on 1935 to 1942 and 1944 to 1946 under the U.S. military command and they stationed in Southern Luzon, Mindoro and Palawan.


 * Poland
 * 4th Regiment of Front Guard, Polish-Lithuanian Commonwealth unit formed in 1733
 * 4th Regiment of Line Infantry, a unit of Kingdom of Poland created in 1815, known by it's nick-name Czwartacy
 * 4th Regiment of Chemistry (Brodnica)


 * United States
 * 4th Cavalry Regiment (United States)
 * 4th Marine Regiment (United States)
 * 4th United States Colored Infantry Regiment


 * United Kingdom
 * 4th Regiment of Foot
 * 4th Regiment Royal Artillery