Knaith is a village and civil parish about 3 miles (5 km) south of the town of Gainsborough in the West Lindsey district of Lincolnshire, England.

Knaith is listed as Cheneiðe in the Domesday Book of 1086 with three households, a meadow of 25 acres (10 ha) and 26 acres (11 ha) of woodland, located in the ancient wapentake of Well, in the West Riding of the Parts of Lindsey.

[5] These include a medieval deer park created in the early 13th century,[6] which became a possession of John Darcy, 1st Baron Darcy de Knayth, and his heirs.

[7] Knaith Hall is a red-brick 15th-century building with some timber framing and is now Grade II listed.

[9] St Mary's might be the transept or nave of the church of Heynings Priory, a Cistercian nunnery founded probably around 1150.