Bobby Warren Dean (born 1989 or 1990) is a British Liberal Democrat politician who has been Member of Parliament (MP) for Carshalton and Wallington since 2024.

Dean is from Essex, where he was raised in a council house. His father was a scaffolder and his mother worked as a cleaner. Dean attended Colchester Sixth Form College. He read International Studies at Goldsmiths, University of London, graduating in 2011. He later completed a Master of Science (MSc) in Public Policy at University College London (UCL) in 2022.

Dean runs his own small business advising charities tackling global poverty. He has been a councillor on Sutton London Borough Council for The Wrythe ward since 2022.

Before his election in 2024, Dean unsuccessfully contested the seat of Lewisham Deptford at both the 2017 and 2019 General Elections, coming third both times.

Dean moved to Deptford, South London in 2008. He now lives in Carshalton with his wife Gemma and their dog.