Eastbourne is a constituency for the House of Commons of the UK Parliament. It was created as one of nine in Sussex in 1885, since when it has reduced in geographic size reflecting the growth of its main settlement, Eastbourne. The seat was re-won in 2019 by Caroline Ansell, a Conservative who ousted Liberal Democrat Stephen Lloyd; she earlier did so in 2015. Since the seat's creation it has been won by candidates from either of these two political parties (and their early forebears, the Liberal Party and the Unionist Party). The seat has had four by-elections, lastly in 1990.