EET may refer to:
- Eastern European Time, one of the names of the UTC+2 time zone
- EE Times, a weekly magazine of the electronic industry
- "Eet", a song from Regina Spektor's album Far
- EET (library), a C library for serializing, compressing, storing and accessing data structures
- eet (symbol), an upside-down tee (⊥) used in mathematics and logic
- Electrical Engineering Technology, an engineering technology discipline related to electrical engineering
- Electronic energy transfer, a mechanism describing energy transfer between chromophores
- Epoxyeicosatrienoic acid, a type of biochemical signaling molecule
- Evil Eye Trio, fictional villains
- Extra element theorem, an analytic technique for linear electronic circuits
- School of Engineering of Terrassa, whose Catalan name has EET as an acronym
- Shelby County Airport (Alabama), which has an IATA airport code of EET