25th Regiment

25th Regiment may refer to:

Infantry regiments

 * 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

 * 25th Arkansas Infantry Regiment, a Confederate Army unit

Union Army

 * 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

 * 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