22nd Regiment
- 22 Engineer Regiment (United Kingdom)
- 22nd Continental Regiment
- 22nd Dragoons
- 22nd Engineer Regiment (Australia)
- 22nd Illinois Volunteer Infantry Regiment
- 22nd Infantry Regiment (North Korea)
- 22nd Infantry Regiment (United States)
- 22nd Iowa Volunteer Infantry Regiment
- 22nd Marine Regiment (United States)
- 22nd Michigan Volunteer Infantry Regiment
- 22nd New York Volunteer Infantry Regiment
- 22nd Pennsylvania Cavalry Regiment
- 22nd Punjab regiment
- 22nd Regiment Alabama Infantry
- 22nd Regiment Indiana Infantry
- 22nd Regiment Kansas Militia Infantry
- 22nd Regiment Kentucky Volunteer Infantry
- 22nd Regiment Massachusetts Volunteer Infantry
- 22nd Regiment of Foot
- 22nd Virginia Cavalry
- 22nd Virginia Infantry Regiment
- 22nd Wisconsin Volunteer Infantry Regiment
- Lapland Ranger Regiment
- Royal 22nd Regiment
- Special Air Service
- Värmland Regiment