Worthing (/ˈwɜrðɪŋ/ WERDH-ing) is a large seaside town with borough status in West Sussex, in the historic county of Sussex. It is situated at the foot of the South Downs, 10 miles (16 km) west of Brighton, and 18 miles (29 km) east of the county town of Chichester. With an estimated population of 104,600 and an area of 12.5 square miles (32.37 km2) the borough is the second largest component of the Brighton/Worthing/Littlehampton conurbation, which makes it part of the 12th most populous urban area in the United Kingdom.