Newhaven is a port town in the Lewes district of East Sussex, England, lying at the mouth of the River Ouse.

Lewes is a local government district in East Sussex, England. The district is named after the town of Lewes. The largest town is Seaford. The district also includes the towns of Newhaven, Peacehaven and Telscombe and numerous villages and surrounding rural areas. The Council is based at Marine Workshops a former industrial building in Newhaven which it shares with East Sussex Colleges Group.