Frédéric Blanchy (1 July 1868 – 1 October 1944) was a French sailor who competed in the 1900 Summer Olympics.
He was crew on the British/French boat Ollé, which won the gold medals in both races of the 2-3 ton class with fellow crew member Jacques Le Lavasseur and helmsman William Exshaw.
He also participated in the open class, but did not finish