Nina may refer to:
- Pronounced as 'Neena'. Nina Lenya Greyornikov, a member of a women's swimming team from an unnamed Iron Curtain country competing at the International Sports Club in Washington [Portrayed by Barbara Stanek, Episode #30: "The Last One in is a Rotten Spy"].
- Pronounced as 'Niner'. Cover name used by Agent 99 while posing as a maid at the Bulmanian embassy in Washington DC [Episode #132: "How Green Was My Valet"].
- Pronounced as 'Neena'. Companion of Gino Columbus on his trip to Washington [Uncredited, Episode #136: "Hello, Columbus - Goodbye, America"].