Caistor is a town and civil parish in the West Lindsey district of Lincolnshire, England.

[1] It lies at the north-west edge of the Lincolnshire Wolds, on the Viking Way, and just off the A46 between Lincoln and Grimsby, at the A46, A1084, A1173 and B1225 junction.

[2] Its name comes from the Anglo-Saxon ceaster ("Roman camp" or "town") and was given in the Domesday Book of 1086 as Castre.

[4] The market square lies at the heart of a conservation area which contains 56, mainly Grade II, listed buildings.

Notable buildings in the town include Caistor Grammar School, founded in 1633,[5] and Sessions House, built in 1662.

[citation needed] Sir Henry Newbolt, author of Drake's Drum, was educated at the school.

[14] Fonaby is a hamlet and deserted medieval village just north of Caistor, mentioned in the Domesday Book as having 18 households and three acres of meadow, and held by William I.

One of the farms and the house are fronted by the viking According to a local tradition, one of Jesus's 12 apostles, Simon the Zealot, came to England, where he is supposed to have been martyred somewhere in the vicinity of Caistor.