3rd Regiment

3rd Regiment or Third Regiment may refer to:

Australia

• 3rd/4th Cavalry Regiment (Australia)
• 3rd Combat Engineer Regiment (Australia)

Canada

• 3rd Prince of Wales' Canadian Dragoons
• 3rd Regiment, Canadian Mounted Rifles

Confederate States

• 3rd Alabama Infantry Regiment
• 3rd Arkansas Cavalry Regiment (Confederate)
• 3rd Arkansas Consolidated Infantry Regiment
• 3rd Arkansas Infantry Regiment (Confederate)
• 3rd Florida Infantry Regiment
• 3rd Kentucky Infantry Regiment (Confederate)
• 3rd Louisiana Infantry Regiment
• 3d Mississippi Cavalry Regiment
• 3rd Mississippi Infantry Regiment
• 3rd Missouri Cavalry Regiment (Confederate)
• 3rd Missouri Infantry Regiment (Confederate)
• 3rd Regiment, Arkansas State Troops
• 3rd Texas Cavalry Regiment
• 3rd Texas Cavalry Regiment (Arizona Brigade)
• 3rd Texas Infantry Regiment
• 3rd Virginia Cavalry Regiment
• 3rd Virginia Infantry Regiment

France

• 3rd Algerian Tirailleurs Regiment
• 3rd Cuirassier Regiment (France)
• 3rd Dragoon Regiment (France)
• 3rd Foot Grenadier Regiment of the Imperial Guard
• 3rd Foreign Infantry Regiment
• 3rd Combat Helicopter Regiment
• 3rd Marine Infantry Regiment
• 3rd Marine Infantry Parachute Regiment
• 3rd Parachute Chasseur Regiment

Greece

• 3/40 Evzone Regiment
• Serres Division

India

• 3rd Bengal Light Cavalry
• 3rd Bombay European Regiment
• 3rd Brahmans
• 3rd Cavalry Regiment (India)
• 3rd Gorkha Rifles
• 3rd Madras Regiment
• 3rd Regiment of Bengal Native Infantry
• 3rd Skinner's Horse

Italy

• 3rd Alpini Regiment
• 3rd Armored Infantry Regiment (Italy)
• 3rd Army Aviation Support Regiment "Aquila"
• 3rd Artillery Regiment "Pistoia"
• 3rd Bersaglieri Regiment
• 3rd Engineer Regiment (Italy)
• 3rd Field Artillery Regiment (Mountain)
• 3rd Heavy Artillery Regiment "Volturno"
• 3rd Regiment "Granatieri di Sardegna"
• 3rd Signal Regiment (Italy)
• 3rd Targeting Support Regiment "Bondone"
• Regiment "Savoia Cavalleria" (3rd)

Japan

• 3rd Tank Regiment (Japan)

Lithuania

• 3rd Infantry Regiment (Lithuania)

Poland

• 3rd Infantry Regiment (Duchy of Warsaw)
• 3rd Silesian Uhlan Regiment
• 3rd Uhlan Regiment (Duchy of Warsaw)

South Africa

• 3rd South African Infantry Regiment

Spain

• 3rd Swiss Regiment Reding

United Kingdom

• 3rd County of London Yeomanry (Sharpshooters)
• 3rd (UK) Division Signal Regiment
• 3rd Dragoon Guards
• 3rd East Anglian Regiment
• 3rd Regiment of Foot (redesignated The Buffs (Royal East Kent Regiment))
• 3rd Regiment of Foot Guards (redesignated Scots Guards)
• 3rd Regiment Royal Horse Artillery
• 3rd Royal Lancashire Militia (The Duke of Lancaster's Own)
• 3rd (Royal Northumberland Fusiliers) Reconnaissance Regiment
• 3rd Royal Tank Regiment
• 3rd The King's Own Hussars
• King's Own (3rd Staffordshire) Rifle Militia

United States

• 3rd Air Defense Artillery Regiment
• 3rd Arkansas Cavalry Regiment (Union)
• 3rd Aviation Regiment (United States)
• 3rd Battalion, 3rd Marines
• 3rd California Infantry Regiment
• 3rd Cavalry Regiment (United States)
• 3rd Connecticut Infantry Regiment
• 3rd Connecticut Regiment
• 3rd Continental Artillery Regiment
• 3rd Continental Light Dragoons
• 3rd Delaware Infantry Regiment
• 3rd Field Artillery Regiment (United States)
• 3rd Georgia Regiment
• 3rd Infantry Regiment (United States)
• 3rd Illinois Cavalry Regiment
• 3rd Iowa Cavalry Regiment
• 3rd Iowa Infantry Regiment
• 3rd Indiana Cavalry Regiment
• 3rd Indiana Volunteers (Mexican-American War)
• 3rd Kansas Infantry Regiment
• 3rd Kansas Militia Infantry Regiment
• 3rd Kentucky Cavalry Regiment (Union)
• 3rd Kentucky Infantry Regiment (Union)
• 3rd Maine Infantry Regiment
• 3rd Marine Littoral Regiment
• 3rd Maryland Infantry Regiment
• 3rd Maryland Infantry Regiment, Potomac Home Brigade
• 3rd Maryland Regiment
• 3rd Massachusetts Cavalry Regiment
• 3rd Massachusetts Heavy Artillery Regiment
• 3rd Massachusetts Militia Regiment
• 3rd Michigan Cavalry Regiment
• 3rd Michigan Infantry Regiment
• 3rd Michigan Infantry Regiment (reorganized)
• 3rd Minnesota Infantry Regiment
• 3rd Missouri Cavalry Regiment (Union)
• 3rd Missouri Colored Infantry Regiment
• 3rd Missouri Infantry Regiment (Union)
• 3rd Missouri US Reserve Corps Infantry Regiment
• 3rd New Hampshire Infantry Regiment
• 3rd New Hampshire Regiment
• 3rd New Jersey Cavalry Regiment
• 3rd New Jersey Regiment
• 3rd New York Provisional Cavalry Regiment
• 3rd New York Regiment
• 3rd North Carolina Regiment
• 3rd Ohio Infantry Regiment
• 3rd Pennsylvania Infantry Regiment
• 3rd Pennsylvania Regiment
• 3rd Regiment, New York State Artillery (redesignated 1st Battalion, 258th Field Artillery Regiment)
• 3rd Regiment of Riflemen
• 3rd Rhode Island Cavalry Regiment
• 3rd Rhode Island Heavy Artillery Regiment
• 3rd Rhode Island Infantry Regiment
• 3rd South Carolina Colored Infantry Regiment
• 3rd South Carolina Regiment
• 3rd Tennessee Cavalry Regiment
• 3rd Tennessee Infantry Regiment
• 3rd United States Colored Heavy Artillery Regiment
• 3rd United States Colored Infantry Regiment
• 3rd U.S. Dragoons
• 3rd Vermont Infantry Regiment
• 3rd Virginia Regiment
• 3rd Virginia Volunteer Infantry Regiment (1898)
• 3rd West Virginia Cavalry Regiment
• 3rd West Virginia Infantry Regiment
• 3rd Wisconsin Cavalry Regiment
• 3rd Wisconsin Infantry Regiment

Yugoslavia

• 3rd Air Reconnaissance Regiment
• 3rd Training Aviation Regiment (redesignated 105th Fighter-Bomber Aviation Regiment)