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