Cheshire Constabulary is the territorial police force responsible for policing the English unitary authorities of Cheshire East, Cheshire West and Chester, Borough of Halton and Borough of Warrington. The force is responsible for policing an area of 946 square miles (2,450 km2) with a population of approximately 1 million. Chief Constable Mark Roberts was appointed in 2021. The deputy chief constable is Julie Cooke, appointed in April 2019.