8th Division
- 8th (Lucknow) Division
- 8th Air Division
- 8th Air Division (People's Republic of China)
- 8th Anti-Aircraft Division (United Kingdom)
- 8th Armored Brigade (People's Republic of China)
- 8th Armored Division (United States)
- 8th Armoured Division (South Africa)
- 8th Armoured Division (Syria)
- 8th Armoured Division (United Kingdom)
- 8th Bavarian Reserve Division
- 8th Canadian Infantry Division
- 8th Cavalry Division (German Empire)
- 8th Cavalry Division (Russian Empire)
- 8th Division (Australia)
- 8th Division (German Empire)
- 8th Division (Imperial Japanese Army)
- 8th Division (Iraq)
- 8th Division (Japan)
- 8th Division (North Korea)
- 8th Ersatz Division (German Empire)
- 8th Guards Airborne Division
- 8th Guards Rifle Division
- 8th Infantry Division (France)
- 8th Infantry Division (Greece)
- 8th Infantry Division (India)
- 8th Infantry Division (Philippines)
- 8th Infantry Division (Poland)
- 8th Infantry Division (Russian Empire)
- 8th Infantry Division (South Korea)
- 8th Infantry Division (United Kingdom)
- 8th Infantry Division (United States)
- 8th Jäger Division (Wehrmacht)
- 8th Landwehr Division (German Empire)
- 8th Motor Rifle Division NKVD
- 8th Mountain Division (Wehrmacht)
- 8th Najaf Ashraf Division
- 8th Panzer Division (Wehrmacht)
- 8th Parachute Division (Germany)
- 8th Rifle Division (Soviet Union)
- 8th SS Cavalry Division Florian Geyer
- 8th Siberian Rifle Division (Russian Empire)
- Division 8 (Swedish football)
- XXX Corps (Pakistan)