Nicholas Charles Dempsey[4] (born 13 August 1980 in Norwich) is a retired British windsurfer, who lives in Poole, Dorset.

[6] Dempsey booked his first international success at the 1998 Mistral Youth World Championships, where he won the bronze medal.

As a senior his first win was clinched at the North Sea Cup Series in Pevensey Bay, and an additional third place in the Kiel Week.

He continued winning competitions in 2001 and beyond like Athens Eurolymp Week, Kieler Woche and the Spa Regatta before finishing third at the 2004 Summer Olympics to take the windsurfing bronze medal.

[7] In the 2016 Summer Olympics, Dempsey again won the silver in the RS:X Class, again behind van Rijsselberge.