Jacqueline West is an American costume designer. He work appears in the films Quills (2000), The Curious Case of Benjamin Button (2008), The Social Network (2010), The Tree of Life (2011), Argo (2012), The Revenant (2015), Dune (2021), and Killers of the Flower Moon (2023). She has been nominated for the Academy Award for Best Costume Design five times.

West began her career as a fashion designer in the San Francisco Bay Area, where she owned a boutique on Gilman Street in West Berkeley. There she created and sold her eponymous "Identikit by Jacqueline West" line.^[1]

West ventured into film costume design in the 1990s after being persuaded to do so by Philip Kaufman. She first worked for the director as a creative consultant on Henry & June (1990).^[1] Their professional relationship continued on the films Rising Sun (1993) and Quills (2000); for creating costumes in the latter, she garnered her first Academy Award nomination.^[1] West stated that Kaufman, who shaped her approach to dressing actors, was among the major influences on her career; the other was her mother, an avant-garde fashion designer of the 1940s and 1950s.^[2] 

West worked with director David Fincher on The Curious Case of Benjamin Button (2008), which turned out to be a difficult task for her due to its epic scope and the need to maintain the integrity of each character's garments in a story that takes place through almost 100 years of different clothing styles and fashions.^[2] Another challenge was making Benjamin (Brad Pitt) look both old and young at the beginning of the film and young and old at the film's end.^[3] West later said that Pitt called her a method costumer for those approaches.^[2]

West and the Fashion Institute of Design & Merchandising established The Jacqueline West Scholarship for “an outstanding Native American interested in the study of fashion or costume design.”^[4]

West is a member of the LGBT community.^[5]