The county histories listed below are accessible free of charge. Many of the books feature pictures of buildings that are no longer with us.
- A topographical and statistical description of the county of Northampton by G A Cooke [c.1826] Appears to be undated but refers to population figures in 1821, indicating it was written or revised between then and the census of 1831.
- Britannia by William Camden [1610] An English translation of the chapter about Northamptonshire in this edition by Dana F Sutton.
- History and Antiquities of the county of Northampton volume 1 by George Baker [1822-1830]
- History and Antiquities of the county of Northampton volume 2 by George Baker [1844]
- History and Antiquities of Northamptonshire volume 1 by John Bridges, edited by Peter Whalley [1791] (**)
- History and Antiquities of Northamptonshire volume 2 by John Bridges, edited by Peter Whalley [1791] (**)
- History, Gazetteer and Directory of Northamptonshire by William Whellan and Co. [1849]
- History of Northampton and its vicinity by John Cole [1815] First edition.
- History of Northampton and its vicinity by John Cole [1831] Some pages of the First edition are in a better condition.
- Magna Britannia by Thomas Cox [1720] Extracts relating to Northamptonshire. (**)
- Northamptonshire by Malcolm William Brown [1911]
- The Beauties of England, volume 11: by J Evans & J Britton [1810]. The last section of this book is about Northamptonshire. At the end of it, before the index, is a list of previously published books, maps and views relating to the county.
- The natural history of Northamptonshire with some account of the antiquities by John Morton [1712]
- Victoria County History of Northamptonshire volume 1 [1902] Natural history, Early man, Romano-British remains, Anglo-Saxon remains, Introduction to the Northamptonshire Domesday, Text of the Northamptonshire Domesday, The Northamptonshire Survey, Monumental effigies & Domesday index.
- Victoria County History of Northamptonshire volume 2 [1906] Religious houses.
- Victoria County History of Northamptonshire volume 3 [1930] Northampton, Polebrook hundred, Huxloe hundred, borough of Higham Ferrers & Higham Park.
- Victoria County History of Northamptonshire volume 4 [1937] Higham Ferrers hundred, Spelhoe hundred, Hamfordshoe hundred, Orlingbury hundred & Wymersley hundred.
- Victoria County History of Northamptonshire volume 5 [2002] Cleyley hundred.
In addition, these works concern aspects of the production of county histories: