Balksbury is the site of a former Bronze Age hillfort to the southwest of Andover, Hampshire. Originally triangular in shape, most of it has been destroyed by the A303 Andover Bypass, and a large housing development. Only the very southwest parts survive, visible, and up to 1m in height. It was a large hillfort first occupied in the Late Bronze Age, and probably had rather a nice view over the confluence of Pillhill brook and the River Anton, below and to the southeast. This was also the direction of the single gated entrance. It was used until and during the Roman period.