In archaeology, Banjo enclosure is the name given to a type of archaeological feature of the British middle Iron Age. The are so named because in plan they consist of a small round area with a long entrance track leading inwards from one direction. This gives them the appearance in plan of frying pans or banjos. The enclosure is defined by a low bank and ditch. The earthworks at the end of the track are sometimes turned outwards, creating a funnel effect.

They were small farming settlements occupied between around 400 and 100 BC although some appear to have been used as high-status dwellings.