Micro is a word that comes from the Greek μικρός (mikrós), meaning "small". It can be used to indicate a smaller than average scale (microscopic scale), as opposed to prefixes mega and macro, which can be used to indicate a larger than average scale.

Micro may refer to:

  • micro- (μ) a prefix in the SI and other systems of units denoting a factor of 10−6 (one millionth)
  • MICRO Information Management System, an early set-theoretic database management system
  • Micro programming language, a simple programming language used in teaching compiler construction techniques
  • Micro (band), a Thai rock band
  • Micro (car), the first car company from Sri Lanka
  • Micro (novel), a novel written by Michael Crichton and Richard Preston
  • Micro (wrestler), a Japanese professional wrestler
  • Mikro, a Greek electronic music group
  • International Symposium on Microarchitecture, the one of the most important academic conference on computer architecture