Achurch (formerly Asenciran sometimes Thorpe Achurch) is a village in Northamptonshire, England. It was called Asechirce in the Domesday Book. The population of the civil parish (including Thorpe Waterville also Wigsthorpe and known as Thorpe Achurch) at the 2011 census was 421.
It is part of the civil parish of Lilford-cum-Wigsthorpe and Thorpe Achurch and the district of East Northamptonshire. It has lent its name to people's surnames who are believed to have originated from the village.
Robert Browne who had previously founded the Brownists, a forerunner of Congregationalism, was rector here 1591 - 1631.
The parish includes the Grade 1 listed home of Lilford Hall.
Achurch is a surname. Notable people with the surname include:
- James Achurch (1928–2015), Australian javelin thrower
- Janet Achurch (1864–1916), English actress and actor-manager
- Mitchell Achurch (born 1988), Australian rugby league player