This is a list of divisions of the United States Army past and present. Armored, cavalry, and infantry are each numbered in their own sequences, and are thus grouped; the airborne and mountain divisions are numbered with the other infantry.
Additional fictitious divisions belonging to the non-existent US 14th Army were created as part of the Operation Quicksilver deception in 1944.
- US 1st Armored Division
- US 2nd Armored Division
- US 3rd Armored Division
- US 4th Armored Division
- US 5th Armored Division
- US 6th Armored Division
- US 7th Armored Division
- US 8th Armored Division
- US 9th Armored Division
- US 10th Armored Division
- US 11th Armored Division
- US 12th Armored Division
- US 13th Armored Division
- US 14th Armored Division
- US 16th Armored Division
- US 20th Armored Division
- US 27th Armored Division
- US 30th Armored Division
- US 40th Armored Division
- US 48th Armored Division
- US 49th Armored Division
- US 50th Armored Division
- US 1st Cavalry Division
- US 2nd Cavalry Division
- US 1st Infantry Division
- US 2nd Infantry Division
- US 3rd Infantry Division
- US 4th Infantry Division
- US 5th Infantry Division
- US 6th Infantry Division
- US 7th Infantry Division
- US 8th Infantry Division
- US 9th Infantry Division
- US 10th Mountain Division
- US 13th Airborne Division
- US 17th Airborne Division
- US 24th Infantry Division
- US 25th Infantry Division
- US 26th Infantry Division
- US 27th Infantry Division
- US 28th Infantry Division
- US 29th Infantry Division
- US 30th Infantry Division
- US 31st Infantry Division
- US 32nd Infantry Division
- US 33rd Infantry Division
- US 34th Infantry Division
- US 35th Infantry Division
- US 36th Infantry Division
- US 37th Infantry Division
- US 38th Infantry Division
- US 40th Infantry Division
- US 41st Infantry Division
- US 42nd Infantry Division
- US 43rd Infantry Division
- US 44th Infantry Division
- US 45th Infantry Division
- US 63rd Infantry Division
- US 65th Infantry Division
- US 66th Infantry Division
- US 69th Infantry Division
- US 70th Infantry Division
- US 71st Infantry Division
- US 75th Infantry Division
- US 76th Infantry Division
- US 77th Infantry Division
- US 78th Infantry Division
- US 79th Infantry Division
- US 80th Infantry Division
- US 81st Infantry Division
- US 82nd Airborne Division
- US 83rd Infantry Division
- US 84th Infantry Division
- US 86th Infantry Division
- US 87th Infantry Division
- US 88th Infantry Division
- US 89th Infantry Division
- US 90th Infantry Division
- US 91st Infantry Division
- US 92nd Infantry Division
- US 93rd Infantry Division
- US 94th Infantry Division
- US 95th Infantry Division
- US 96th Infantry Division
- US 97th Infantry Division
- US 98th Infantry Division
- US 99th Infantry Division
- US 100th Infantry Division
- US 101st Airborne Division
- US 102nd Infantry Division
- US 103rd Infantry Division
- US 104th Infantry Division
- US 106th Infantry Division
- US 108th Infantry Division
- Americal Division
