Formations of the United States Army during the Vietnam War

The following is a list of divisions of the United States Army during the Vietnam War.

AirMobile Divisions

 * 1st Cavalry Division Patch.svg 1st Cavalry Division
 * US 101st Airborne Division patch.svg 101st Airborne Division

Infantry Divisions

 * 1st Infantry Division SSI (1918-2015).svg 1st Infantry Division
 * 4th Infantry Division SSI.svg 4th Infantry Division
 * 9th Infantry Division patch.svg 9th Infantry Division
 * Americal patch.svg 23rd Infantry Division
 * 25th Infantry Division shoulder sleeve insignia.png 25th Infantry Division

Independent Brigades

 * 1st Brigade, 5th Infantry Division
 * 3rd Brigade, 82nd Airborne Division
 * 11th Armored Cavalry Regiment
 * 11th Infantry Brigade
 * 173rd Airborne Brigade
 * 196th Infantry Brigade
 * 198th Infantry Brigade
 * 199th Infantry Brigade
 * 18th Engineer Brigade (combat)
 * 20th Engineer Brigade
 * 223rd Aviation Brigade

Armored Divisions

 * 1st Armored Division
 * 2nd Armored Division
 * 3rd Armored Division
 * 4th Armored Division

Infantry Divisions

 * 2nd Infantry Division
 * 3rd Infantry Division
 * 7th Infantry Division
 * 8th Infantry Division
 * 24th Infantry Division
 * 10th Mountain Division

Armored Divisions

 * 30th Armored Division
 * 50th Armored Division

Infantry Divisions

 * 26th Infantry Division
 * 28th Infantry Division
 * 30th Infantry Division
 * 38th Infantry Division
 * 40th Infantry Division
 * 42nd Infantry Division
 * 47th Infantry Division
 * 49th Infantry Division