Allerston is a village and civil parish in the Ryedale district of North Yorkshire, England, about five miles east of Pickering. According to the 2001 census, the parish had a population of 309, reducing slightly to 302 at the 2011 Census.There is a village church, St Mary's.During the 1930s, unemployed men were set to work in Dalby Forest, breaking ground, building tracks, and undertaking other heavy labour.