This parish is a peninsula of Hertfordshire jutting northwards into the county of Bedford. The southern half of the parish is part of the chalky downs of the Chiltern Hills, which are covered with short turf and plantations of fir trees. The hills end abruptly and close to their foot lies the village of Hexton. It stands among grass fields and orchards at the beginning of a low plain, which, sloping gradually to the north, becomes merged in the large plain of southern Bedfordshire. The southern boundary of the parish is the grassy Icknield Way.
Hexton formerly belonged to the half-hundred of Hitchin, but when it came into the possession of the abbots of St. Albans it was probably added by them to their hundred of Cashio. Hexton was originally named Hehstanstuna, Hegestanestone (11th century); Hextenestona (14th century); Hextone (15th century).
Much of the parish was owned by George Hodgson, owner of Hexton Hall, a large modernized house standing in an extensive park. There is no regular village street, but most of the houses are near cross roads, which lead north, south, east and west and connect Hexton with the neighbouring small villages.
Hexton stands in well wooded and hilly country adjacent to the Bedfordshire border. The church, dedicated to St Faith, is mediaeval with heavy 19th-century restoration. The Manor House in its extensive park dates from at least the 15th century, although it was substantially altered in 1901. Far older is the Iron Age camp of Ravensburgh Castle, a scheduled ancient monument which straddles a hilltop a mile to the south-west. Limited excavations during the 1960s showed that it was built about 400 BC (See J.Dyer in D.W.Harding Hillforts: Later Prehistoric Earthworks (Academic Press) 1976, p. 153ff. and refortified around 50 BC (see Dyer, ditto). Rectangular in shape, and enclosing 9 hectares, it is strongly defended by a double rampart and ditch on the north, west and south sides, with a more massive rampart on the vulnerable eastern flank. Of its two entrances, that at the north-west corner belongs to the original build, whilst the south-eastern entrance was added around 50 BC. A gap halfway along the eastern side is modern. It has been suggested that Ravensburgh might have been the headquarters of the Celtic chieftain, Cassivelaunus, attacked in 54 BC. The excavations showed signs of burning on the eastern rampart. Access to the site is strictly limited. Finds of pottery and a bird-headed weaving comb are in the Stockwood Discovery Centre, Luton.