Downside is a small village in the English county of Surrey, most of buildings of which form a cluster, in the local government district of Elmbridge, centred on Downside Common which is 18 miles (29 km) southwest of London and 8.4 miles (13.5 km) northeast of Guildford, the county town. It has an inn, Downside Sports and Social Club, regular village hall events and an annual sports day.