Oldox Hillfort is an iron age hillfort located near Oxton, close to Arnold, Nottinghamshire.
The hillfort is a sub-oval earthwork, featuring a double bank and ditch and is situated 250 yards below the ridge known as Old Ox.
The location for the site was selected here due to its secluded nature and is also sheltered from the prevailing northeast wind. The site is concealed from all sides,although the south east has the strongest defences due to the terrain opening up.
A simple causeway entrance is located to the north, yet the south east entrance is an elaborate complex. To the south of this, is a spring fed pond which would supply fresh water.
Originally the site is thought to have consisted of a simple defended homestead enclosure or farm settlement, with the enclosure strengthened for defence later, perhaps due to the threat of invasion.