Ferdinand "Fred" Helmuth Imhoff (born 15 February 1942 in The Hague) is a sailor from the Netherlands, who represented his country at the 1972 Summer Olympics in Kiel, Germany as helmsman in the Flying Dutchman Brave Henderik IV (H-230).

Later Imhoff specialized in keelboat classes in general and belonged to the world top in the Dragon between 1986 and 2006.

In the end Fred Imhoff and Heike Blok lost the lawsuit and were removed from the 1976 selection.

Imhoff owned a specialized enterprise in sailing equipment, and was one of the first overseas dealers for Harken fittings.

Fred Imhoff published (some of them in cooperation with Lex Pranger) several books on sailing that were translated in many languages.