Sacha Vierny (10 August 1919 – 15 May 2001) was a French cinematographer. He was born in Bois-le-Roi, Seine-et-Marne, Île-de-France, France, and died in Paris, France, at the age of 81. He is most famous for his work with Alain Resnais – especially for the two films Hiroshima mon amour and L'année dernière à Marienbad – and with Peter Greenaway (The Cook, the Thief, His Wife & Her Lover, Prospero's Books).

Alain Resnais and Vierny made 10 films together from 1955 to 1984, starting with the Holocaust film Night and Fog (Nuit et brouillard in original French) and ending with L'amour à mort. He was the cinematographer of choice for British film-maker Peter Greenaway from A Zed & Two Noughts (1985) onward, and shot virtually everything Greenaway directed, including his television work, up to and including 8½ Women (1999). Greenaway has also referred to Vierny as his "most important collaborator".

Vierny also worked with such directors as Luis Buñuel (Belle de jour), Raoul Ruiz, Pierre Kast, Chris Marker and Paul Paviot.

• Sacha Vierny at IMDb
• Sacha Vierny at the BFI's Screenonline
• Cinematographers.nl entry