Righteous armies refer to 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