NEG is an abbreviation that may refer to:
- the IATA code for Negril Aerodrome in Jamaica
- A section of an allium
- Net energy gain
- Non-Evaporable Getter, a material used in high vacuum technology
- Negative (disambiguation), in various contexts, and a common military command
- Negotiator, e.g. Estate agent
- National Express Group, a UK-based transport group
- NEG Micon, now part of Vestas
- Noah Eli Gordon, an American poet
It may also refer to someone with the name Neg:
- Neg Dupree, of Neg's Urban Sports