Hellidon is a village and civil parish about 5 miles south-west of Daventry in Northamptonshire, England. The parish area is about 1,600 acres. It lies 520 feet – 590 feet above sea level on the north face of an ironstone ridge, its highest point, 670 feet at Windmill Hill, being 0.5 miles south-east of the village. The Leam and tributaries rise in the parish. The 2011 Census gave a population of 256, estimated at 286 in 2019.