Washington is a village and civil parish in the Horsham District of West Sussex, England. It is located five miles (8 km) west of Steyning and three miles (4.8 km) east of Storrington on the A24 between Horsham and Worthing. The parish covers an area of . In the 2001 census 1,930 people lived in 703 households, of whom 820 were economically active.
The village lies at the foot of the South Downs escarpment. The Anglican parish church is dedicated to St Mary. There is one pub, the Frankland Arms, a primary school and a village hall with an adjoining sports field. The hamlet named Rock lies to the north of the A283 road.