Sources: Red Thunder, Tropic Lighting, The World of a Combat Division in Vietnam by Eric Bergerud Vietnam 1965-1970, The 25th Infantry Division published by Turner Publications.
- 1st Battalion, 5th Infantry (Mechanized)
- 4th Battalion, 9th Infantry (Manchu)
- 2d Battalion, 12th Infantry
- 2d Battalion, 14th Infantry (Golden Dragons)
- 2d Battalion, 22d Infantry (Mechanized)
- 3d Battalion, 22d Infantry
- 4th Battalion, 23d Infantry (Mechanized) (Tomahawks)
- 1st Battalion, 27th Infantry (Wolfhounds)
- 2d Battalion, 27th Infantry (Wolfhounds)
- 2d Battalion, 34th Armor
- 3d Squadron, 4th Cavalry (Armoured)
- Company F, 50th Infantry (Long-Range Patrol)
- 25th Aviation Battalion
- 1st Battalion, 8th Artillery (105mm) (Automatic Eighth)
- 7th Battalion, 11th Artillery (105mm) (Dragon Regiment)
- 3d Battalion, 13th Artillery (155mm) (The Clan)
- 2d Battalion, 77th Artillery (105mm)
- 6th Battalion, 77th Artillery (105mm)
- 1st Support Battalion (Provisional)
- 2d Support Batallion (Provisional)
- 3d Support Batallion (Provisional)
- 25th Medical Battalion
- 25th Supply and Transport Battalion
- 65th Engineer Battalion
- 125th Signal Battalion
- 725th Maintenance Battalion
- 25th Administrative Company
- 25th Military Police Company
- 372d Army Security Agency Company
- 9th Chemical Detachment
- 25th Military Intelligence Company
- 18th Military History Detachment
- 15th Public Information Detachment
- 20th Public Information Detachment
- 1st Platoon, 568th Medical Company
- 1st Battalion, 27th Artillery
- 2d Civil Affairs Company
- 2d Battalion, 32d Artillery
- 3d Squadron, 17th Air Cavalry
- B Battery, 5th Battalion, 2d Artillery (Automatic Weapons)
- 7th Transportation Trailer Transfer Point
- 12th Evacuation Hospital
- 20th Transportation Company
- United States Air Force
- American Red Cross
- 40th Medical Attachment
- 45th Surgical Hospital
- 44th Explosive Ordinance Detachment
- 51st Infantry Company
- 86th Signal Battalion
- 94th Maintenance Company
- 159th Medical Attachment
- 212th MP (Sentry Dog) Company
- 269th Aviation Battalion
- 341st Aviation Support Detachment
- 372d R&R Company
- 390th Quartermaster Detachment
- 554th Engineer Battalion
- 548th Maintenance Company
- 587th Signal Company
- Wounded Data & Munitions Effectiveness Team