Horsham railway station serves the town of Horsham in West Sussex, England. It is 37 miles 56 chains (60.7 km) down the line from London Bridge, measured via Redhill, on the Arun Valley Line and the Sutton & Mole Valley Lines, and train services are provided by Southern. Services on the Sutton & Mole Valley Line from London Victoria via Dorking terminate here, the others continue into the Arun Valley: a half-hourly service from London Victoria to Southampton Central or Portsmouth Harbour (alternating) and Bognor Regis. These trains usually divide here with the front (Southampton/Portsmouth) portion travelling fast (next stop Barnham) and the rear (Bognor Regis) half providing stopping services.