MEP may refer to:
- Member of the European Parliament, an elected politician in the European Union
- Mechanical, Electrical and Plumbing, a part of the building design industry
- Mean effective pressure, of internal combustion engines
- Media embedded Processor (MeP), a CPU design from Toshiba Semiconductor
- Manufacturing Extension Partnership, a NIST program that provides business and technical assistance to manufacturers
- Melanophlogite, a zeolite-like polymorph of silica (SiO2).
- Meopham railway station, England, station code MEP
- Message Exchange Pattern, a communications protocol concept
- Missions étrangères de Paris, a French Catholic missionary organization
- Model European Parliament, part of the Model European Communities Project
- Motor evoked potential, a type of evoked potential,
- Movimiento Electoral del Pueblo, (People's Electoral Movement), a left-wing political party of Venezuela
- Movimento Esperança Portugal (Hope for Portugal Movement), a minor political party in Portugal
- MEP, an unidentifiable mammalian creature found in the Odd Todd cartoon series & website.
- Multi Engine Piston, a pilot's rating class
- Mission Essential Personnel, a defense contractor in Columbus, Ohio specializing in linguistic and role-playing personnel
- Mars Exploration Program, a NASA program for the exploration of Mars