5th Regiment or 5th Infantry Regiment may refer to:
Infantry regiments 5th Aviation Regiment (Australia), a unit of the Australian Army 2/5th Armoured Regiment (Australia), a unit of the Australian Army 5th Foot Guards (German Empire), a unit of the Imperial German Army 5th Infantry Regiment (Greece), a unit of the Greek Army 5th Archipelago Regiment, a unit of the Greek Army 5/42 Evzone Regiment, a unit of the Greek Army 5th Guards Grenadiers, a unit of the Imperial German Army 5th Regiment of Foot, a unit of the British Army 5th Dragoon Guards, a unit of the British Army 5th Bengal European Regiment, a unit of the British East India Company 5th Marine Regiment (United States), a unit of the United States Marine Corps 5th Infantry Regiment (United States), a unit of the United States Army Fifth Regiment, a unit loyal to the Spanish republic at the beginning of the Spanish Civil War
American Revolutionary War regiments 5th Continental Regiment 5th Connecticut Regiment 5th Maryland Regiment 5th Massachusetts Regiment 5th New York Regiment 5th North Carolina Regiment 5th Pennsylvania Regiment 5th South Carolina Regiment 5th Virginia Regiment
American Civil War regiments 5th Iowa Volunteer Infantry Regiment 5th Michigan Volunteer Infantry Regiment 5th Minnesota Volunteer Infantry Regiment 5th New York Veteran Volunteer Infantry Regiment 5th United States Colored Infantry Regiment 5th West Virginia Volunteer Infantry Regiment 5th Wisconsin Volunteer Infantry Regiment 5th Missouri Infantry Regiment (disambiguation)
Artillery regiments 5th Medium Regiment, Royal Canadian Artillery, a unit of the Canadian Army 5th Regiment Royal Artillery, a unit of the United Kingdom Army 5th (British Columbia) Field Regiment, Royal Canadian Artillery, a unit of the Canadian Army
Cavalry regiments 5th Cavalry Regiment, a unit of the United States Army 5th Lithuanian Vanguard Regiment American Civil War regiments 5th Regiment Illinois Volunteer Cavalry 5th Regiment Iowa Volunteer Cavalry 5th Michigan Volunteer Cavalry Regiment 5th West Virginia Volunteer Cavalry Regiment
Other regiments 5th Air Reconnaissance Regiment, a unit of Yugoslav Air Force 5th Royal Tank Regiment, an armoured unit of the United Kingdom Army
See also 5th Corps (disambiguation) 5th Army (disambiguation) 5th Division (disambiguation) 5th Brigade (disambiguation) 5th Group (disambiguation) 5th Squadron (disambiguation)