25th Regiment may refer to:
Infantry regiments
edit- 25th Infantry Regiment (Argentina)
- 25th Independent Mixed Regiment, a Japanese unit
- 25th Infantry Regiment (United States)
- 25th Regiment of Foot, a British Army unit
- 25th Punjabis, a British Indian Army unit
- 25th Continental Regiment, a unit during the American Revolutionary War
Units during the American Civil War
edit- 25th Arkansas Infantry Regiment, a Confederate Army unit
Union Army
edit- 25th Connecticut Infantry Regiment
- 25th Illinois Infantry Regiment
- 25th Indiana Infantry Regiment
- 25th Iowa Volunteer Infantry Regiment
- 25th Regiment Massachusetts Volunteer Infantry
- 25th Regiment Kentucky Volunteer Infantry
- 25th Maine Volunteer Infantry Regiment
- 25th Michigan Volunteer Infantry Regiment
- 25th New Jersey Volunteer Infantry Regiment
- 25th New York Volunteer Infantry Regiment
- 25th Wisconsin Volunteer Infantry Regiment
Other regiments
edit- 25th Aviation Regiment (United States)
- 25th Dragoons, a British Army cavalry unit
- 25th Field Artillery Regiment, United States
- 25th Greater Poland Uhlan Regiment
- 25th SS Police Regiment, Germany