Beaconsfield is a constituency in Buckinghamshire represented in the House of Commons of the UK Parliament since 2019 by Joy Morrissey of the Conservative Party. She succeeded Independent and former Conservative Dominic Grieve, whom she defeated following his suspension from the party. The constituency was established for the February 1974 general election.

Joyce Rebekah "Joy" Morrissey is an American-born British politician who has served as the Conservative Member of Parliament (MP) for Beaconsfield in Buckinghamshire since 2019. Morrissey has been a Lord Commissioner of the Treasury since November 2023.