Neo is a prefix from the ancient Greek word for young, neos (νέος), which is derived from the Proto-Indo European word for new, néwos.
Neo may refer to:
- Neo (The Matrix), the protagonist of the Matrix franchise
- Neo (Marvel Comics species), a fictional race of superhumans
- Neo (constructed language), a constructed language created by Arturo Alfandari
- Neo (magazine), the UK's anime, manga and Asian film magazine
- Neo (object-relational toolset), a programming framework
- Neo (keyboard), a portable keyboard by AlphaSmart
- Neo (keyboard layout), an ergonomic keyboard layout
- Neo (Hungarian band), a Hungarian group
- Neo (Italian band), a prog-jazz group
- Neo (UK band) a post-punk band
- Neo, Vietnam, a town in Bac Giang Province, Vietnam
- Neo 1973, smartphone running Openmoko software
- Neo Rauch (born 1960), German artist
- Neo Saiba 彩羽 ネオ (Saiba Neo?) a character from Digimon Adventure V-Tamer 01\
- Neo, the Hokkien/Teochew form of the Chinese family name Liang
- Proton Satria Neo, a car brand
- August Neo (1908–1982), Estonian wrestler
NEO may refer to:
- Near-Earth object, a Solar System object whose orbit brings it into close proximity with the Earth
- New Engine Option, a fuel-efficient option for the Airbus A320 family
- New European Order, a neo-fascist Europe-wide alliance set up in 1951 to promote Pan-European nationalism
- New economic order, NEOs: a social segmentation
- Nissan Ecology Oriented or NEO VVL, an automobile variable valve timing technology
- Non-combatant evacuation operation, an operation conducted to evacuate a country's civilians from another country
- Revised NEO Personality Inventory, a psychometric instrument
- N.E.O., a Lithuanian band
- NEO, software products based on Sun Microsystems' Project Distributed Objects Everywhere
- NEO, a character from Digimon Next
- .NEO, the file extension for computer images in the NeoChrome format