After the Catuvellauni tribes were conquered by the Romans in 43 AD. The Roman road of Watling Street was built through the county, and there were other Roman settlements at Towcester, Northampton, Kettering. After the Romans left, the area became part of the Anglo-Saxon kingdom of Mercia, and Northampton functioned as an administrative centre.

In the 18th and 19th centuries, Northamptonshire became industrialised. The local specialisation was shoemaking and the leather industry, becoming one of Britain's major centres for these crafts by the 19th century.

Northants borders Oxforshire, Buckinghamshire and Bedfordshire to the South. Early Mableys/Mapleys are recorded in the county in the 15th Century, who then migrated south towards Newport Pagnell via Hanslope and Castlethorpe - transportation north-south for commerce along Watling Street playing a major role in migration

In 1841, only 2 of all UK Mapleys (133 in total) were registered in Northants. Only 6 of UK Mableys (193 in total) were based in Northants.

• The hundred Rolls, 1255, 1274-5 and 1279-80
• The Contributions for Ireland, 1642
• The Posse Comitatus, 1798
• Northamptonshire Census, 1841-1921
• UK Census, 1841-1921