Markby is a village in the East Lindsey district of Lincolnshire, 10 miles SE of Louth and 3 miles from the east coast. It is built of roughly coursed re-used ashlar and brick with a thatched roof, the only thatched church in the county. It stands to the E of the main rad through the village, and consists of just a nave and chancel. It was apparently rebuilt from the remains of Markby Priory after the Dissolution, and is mainly 17thc., but contains architectural fragments, some as early as the 13thc, and a blocked N doorway which may be 12thc and is the only feature described here.

According to the Domesday Survey, 4 bovates of land in Markby were held by Odo, Bishop of Bayeux as sokeland of Ashby Puerorum. A total of 18 carucates in Hutton, Thurlby, Sutton on Sea, Trusthorpe and Bilsby and Markby were held by Earl Hugh of Chesterand 1 bovate was held by Jocelyn Fitzlambert.

Markby Priory was founded by Ralf FitzGilbert some time in the reign of Henry II, but was not mentioned earlier than 1204, when the manor had passed to Ralf's son, Hugh (VCH). The house was dissolved in 1536 and the site is now marked by a farmhouse and earthworks.