Deep State is a British espionage thriller television series, written and created by Matthew Parkhill and Simon Maxwell, first broadcast in the United Kingdom on Fox on 5 April 2018. The first eight-part series, which began filming in May 2017, stars Mark Strong as Max Easton, a former field agent for MI6 who is recruited back into the field. The series co-starred Walton Goggins, Joe Dempsie, Karima Adebibe, Lyne Renée, Anastasia Griffith and Alistair Petrie.

The series is produced by Endor Productions for the Fox Networks Group of Europe and Africa. As well as co-creating the series, Parkhill also serves as showrunner, executive producer and director of four of the eight episodes. The series premiered in the United States on 17 June 2018 on Epix.

A second season was commissioned on 5 April 2018. The second season premiered on 28 April 2019 in the United States, starring Walton Goggins as an ex-CIA operative drawn into a political crisis in Mali. As of 2022, there has been no confirmation of a third series.