Irthlingborough is an ancient settlement. Evidence of pre-historic and Roman occupation has been found, together with an Iron-Age hill-fort on Crow Hill, the second largest discovered in Northamptonshire. The Roman road from Lowick to Irchester passed through the parish.
The Battle of waterloo was filmed in 1913 at Irthlingborough and was one of the biggest films of its day. It was made by an American named Charles Weston and he chose the location because the real Duke of Wellington, on visiting the area commented that the countryside resembled the battlefield at Waterloo.