Eddy may refer to:
Eddy (surname), surname used by descendants of a number of English, Irish and Scottish families
Eddy (given name), male given name
Eddy (fluid dynamics), the swirling of a fluid and the reverse current created when the fluid flows past an obstacle
Eddy current, in electromagnetism, loops of electric current induced within conductors by a changing magnetic field.
Eddy current brake, a device used to slow or stop a moving object by generating eddy currents and thus dissipating its kinetic energy as heat.
Eddy (film), a 2015 Italian film
Eddy & The Soul Band, a 1980s Dutch disco group
Eddy (Ed, Edd n Eddy), a character on Ed, Edd n Eddy
Eddy covariance, a statistical method used in meteorology
Eddy Test, administered by the US Navy and Marine Corps during and after World War II
Eddy-class tanker, a former British Royal Fleet Auxiliary class
United States
Eddy, Alabama, an unincorporated community
Eddy, Oklahoma, an unincorporated community
Big Eddy, Kentucky, an unincorporated community
Eddy County, New Mexico
Eddy County, North Dakota
Mount Eddy, California
Eddy Creek (Kentucky), a stream
Eddy Creek (Lackawanna River), a stream in Pennsylvania
Elsewhere
Eddy Island, Nunavut, Canada
Island Eddy, in Galway Bay, Ireland
Eddy Col, Trinity Peninsula, Antarctica
Eddy Point, King George Island, Antarctica