Achurch is a village in the civil parish of Thorpe Achurch, in North Northamptonshire, England. It is situated on a small rise above the River Nene, 5 miles south of the market town of Oundle.
The village's name means 'Asa's church' or 'Asi's church'. Settled successively since the Iron Age, the village was named after the site of the nearby church as 'Aas-kirk', meaning Church by the Water. Subsequently named Asechirce in the Domesday Book of 1086 with land held mainly by Ascelin de Waterville, a Norman knight after whom the adjoining village of Thorpe Waterville is named.
The parish includes the Grade I listed property Lilford Hall and the Grade II* listed Church of St. John the Baptist, an early and late 13th-century Anglican church restored and enlarged by architect William Slater in 1862.
