Annalissa Firth (née Garrett, born 1966) is a British former politician and former barrister who served as the Member of Parliament (MP) for Southend West from 2022 to 2024.

[6] Firth was elected as a councillor representing Brasted, Chevening & Sundridge ward on Sevenoaks District Council in Kent in 2011 and resigned the seat in 2022.

[4] At the 2015 general election, Firth stood unsuccessfully for Erith and Thamesmead, finishing second with 27.4% of the vote behind the incumbent Labour Party MP Teresa Pearce.

[11][12] Firth also stood unsuccessfully at the 2019 general election for Canterbury, finishing second with 45.2% of the vote behind the incumbent Labour MP Rosie Duffield.

[22] Firth visited Archie Battersbee, a 12-year-old boy from Southend at the centre of a life-support withdrawal dispute, in June 2022 and contributed to a fundraiser for him.

[30] She is married to Edward Firth who is a managing director of the investment banking firm Keefe, Bruyette & Woods.