NYM or Nym may refer to:
- New York Mets, a professional baseball team
- New York Magic, an American women’s soccer team
- New York Methodist Hospital, hospital located in Brooklyn, New York
- IATA code for Nadym Airport
- Pseudonym, especially in the context of Internet pseudonyms
- Nym server, a pseudonym server which provides untraceable email addresses
- Nym, an alien character in Star Wars
- The Nym, a race of artificial humanoid sentient plants from the Age of Legends in The Wheel of Time fantasy book series
- Nym, a corporal in Shakespeare's play Henry V and a minor figure in Shakespeare's play The Merry Wives of Windsor
- Nym, a character from the Forgotten Realms setting of Dungeons & Dragons
- Nym, *-onym, an English affix