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- Namor the Sub-Mariner
- (original creation, for unpublished comic) Motion Picture Funnies Weekly, 1939
- (Golden Age) Marvel Comics #1, October 1939
- (modern) in Fantastic Four #4
- Namorita in Sub-Mariner #50
- Nebula in Avengers #257
- Necrom in Excalibur #45
- Negative Zone in Fantastic Four #51
- New Warriors in Thor #411, December 1989
- Nick Fury in Sgt. Fury and His Howling Commandos #1
- Night Thrasher in Thor #411
- Nightcrawler in Giant-Size X-Men #1
- Nightmare in Strange Tales #110
- Nitro in Captain Marvel #34
- Nomad (Jack Monroe) in Captain America #282
- Nova (Richard Rider) in Nova #1 vol 1
- Nova (Sam Alexander) in Marvel Point One one-shot (2011)
- Nova (Frankie Raye) in Fantastic Four #164
Read more about this topic: List Of First Appearances In Marvel Comics Publications