| Unit Name: | Army East Prussia |
| Native Name: | German: Armee Ostpreußen |
| Dates: | 7 April – 9 May 1945 |
| Branch: | German army (Wehrmacht) |
| Type: | Army |
| Battles: | World War II |
| Notable Commanders: | Dietrich von Saucken |
Army East Prussia (German: Armee Ostpreußen) was created from the AOK 2nd Army and also absorbed the remnants of the 4th Army on 7 April 1945. AOK Ostpreußen controlled all the troops in East Prussia and West Prussia. After the loss of the cities of Danzig and Gotenhafen in the East Prussian Offensive the army had been isolated in the Bay of Gdansk.