Like most of what later became Northamptonshire, from early in the 1st century BC the Kettering area became part of the territory of the Catuvellauni, a Belgic tribe, the Northamptonshire area forming their most northerly possession.
The Catuvellauni were in turn conquered by the Romans in 43 AD.
There were 107 acres of meadow, 3 of woodland, 2 mills, 31 villans with 10 ploughs and 1 female slave.
has for centuries been the seat of the Dukes of Buccleuch, major landowners in Kettering and most of the surrounding villages; along with the Watsons of Rockingham Castle, the two families were joint lords of the manor of Kettering.
Protesting at land enclosures at Newton and Pytchley by local landlords the Treshams, on 8 June a pitched battle took place between Levellers - many from Kettering, Corby and particularly Weldon, - and local gentry and their servants (local militias having refused the call to arms).
Andrew Fuller helped Carey found the Baptist Missionary Society and he is remembered in the Fuller Church and Fuller Street.
In 1803 William Knibb was born in Market Street and became a missionary and emancipator of slaves; he is commemorated by the Knibb Centre and Knibb Street.
Northamptonshire was conquered again in 940, this time by the Vikings of York, who devastated the area, only for the county to be retaken by the English in 942.
The first historical reference of Kettering is in a charter of 956 AD in which King Edwy granted ten "cassati" of land to Aelfsige the Goldsmith.