Arundel is a market town and civil parish in a steep vale of the South Downs, West Sussex, England. It lies 49 miles SSW of London, 18 miles WNW of the English Channel city of Brighton, and 10 miles east of the county city of Chichester. Larger nearby towns include Worthing, Littlehampton and Bognor Regis. The much-conserved town with large green buffers has a medieval castle and Roman Catholic cathedral.