A junior sergeant is a military rank used in multiple militaries across the world.

Junior sergeant (Russian: Младший сержант, romanized: Mladshy serzhant) is the designation to the lowest rank in the non-commissioned officer's career group in the Army, Airborne troops, and Air Force of the Russian Federation.

The rank is equivalent to Starshina 2nd class in Navy.

The rank was introduced in the Red Army in 1940.

This military-related article is a stub.