West Grinstead is a village and civil parish in the Horsham District of West Sussex, England. It lies just off the B2135 road four miles northwest from Henfield. It is within the ancient division of the Rape of Bramber. The western River Adur flows through the village. The parish of West Grinstead covers an area of 2584 hectares and consists of the villages of West Grinstead, Littleworth, Partridge Green and Dial Post.