Allostock is a village and civil parish in the unitary authority of Cheshire West and Chester and the ceremonial county of Cheshire, England, about five miles south of Knutsford and 20 miles south of Manchester. Allostock was formerly in the borough of Vale Royal until it was abolished on 1 April 2009 to form Cheshire West and Chester. Allostock is located on an affluent of the river Weaver. It had a population of 816 according to the 2011 census data as well as 325 households.