Miksa Déri (27 October 1854 in Bács, Austrian Empire – 3 March 1938) was a Hungarian electrical engineer, inventor, power plant builder.

He contributed with his partners Károly Zipernowsky and Ottó Bláthy, in the development of the closed iron core transformer and the ZBD model.

His other important invention was the constant voltage AC electrical generator in the Ganz Works in 1883.

Déri is also noted for inventing the single phase type of repulsion motor[3]

This article about a Hungarian engineer, inventor or industrial designer is a stub.