Nikolai may refer to:
- Nikolai Badanov - a playable character in Call of Duty: Finest Hour.
- Codename "Nikolai" - an informant and pilot in the Modern Warfare series.
- Nikolai Belinski - a playable character in Call of Duty: World at War's and Call of Duty: Black Ops' Nazi Zombies.
- Nikolai (Ultranationalist) - A minor character in the level The Sins of the Father in Call of Duty 4: Modern Warfare.