Great Chishill is a village in the civil parish of Great and Little Chishill, South Cambridgeshire, England. The village is about 1 mile (1.6 km) east of the county boundary with Hertfordshire and about 4 miles (6 km) east of Royston. The 2011 Census recorded the parish's population as 678. The parish was part of Essex until 1895, when the county boundary was revised. The highest point of Essex, Chrishall Common and the triple point of Cambridgeshire, Essex and Hertfordshire are near each other about 1.2 miles (2 km) south of Great Chishill.