The Napier Naiad is a British turboprop gas-turbine engine designed and built by D. Napier & Son in the late 1940s.

It was the company's first gas turbine engine.

A twin version known as the Coupled Naiad was developed but both engine projects were cancelled before finding a market.

[1] The Naiad was also used, in adapted form, in the Napier Nomad turbo-compound engine design.

A Napier Naiad is on display at the Science Museum, London.