Righteous armies is a general term for a category of various irregular civilian militias in Korea.
Righteous army or Righteous armies may also refer to:
- Grand Han Righteous Army, a pro-Japanese Chinese army active in North China and Inner Mongolia in 1936
- Righteous Army, self-declared mutinous soldiers and officers of the Imperial Japanese Army during the February 26 incident
- Manchurian Righteous Army , a Japanese militia active in Northeast China and Outer Manchuria during the Russo-Japanese War