Box is a large village and civil parish within the Cotswolds Area of Outstanding Natural Beauty in Wiltshire, England, about 3 miles (5 km) west of Corsham and 5 miles (8 km) northeast of Bath. Box also falls in the easternmost part of the Avon Green Belt. Besides the village of Box, the parish includes the villages of Ashley and Box Hill; Hazelbury manor; and the hamlets of Alcombe, Blue Vein, Chapel Plaister, Ditteridge, Henley, Kingsdown, Middlehill, and Wadswick. To the east the parish includes much of Rudloe, formerly a hamlet but now a housing estate, and the defence establishments and related businesses on the site of the former RAF Rudloe Manor.

Occupation here dates back at least to Roman times. The area is known for its fine stone, and for centuries Box quarries were famous for their product. Today Box is perhaps better known for its Brunel-designed Box railway tunnel.

Box has been twinned with Sorigny, a commune in central France, since 2016.

Box lies in Wiltshire, close to the boundaries with Somerset (roughly 1.0 mile (1.6 km) away as the crow flies) and Gloucestershire (about 1.9 miles (3.1 km) away). The place where the three counties meet is marked by the Three Shire Stones.

The settlements in Box are on higher ground above the steep-sided valley of the Bybrook River, a tributary of the Bristol Avon. Limestone rock is found in much of the parish. Box Ground, a hard-wearing variety of Bath stone, was extracted at quarries such as Box Mine which are now closed. By 2015, the remaining source of Box Ground was Hartham Park quarry at Corsham.

The parish boundary follows the Bybrook in the north-east, and its tributary the Lid Brook in the north-west. The southern boundary of the parish follows the Roman road from Silchester to Bath. The road through Box village, descending to Bathford and Bath, was turnpiked in 1761 to provide a route from Chippenham and Corsham to Bath; this became the present A4.

Prehistoric settlements in the area were hilltop forts such as Bury Camp, 4 miles (6 km) north of present-day Box village. There is evidence in the form of numerous re-used standing stones that there may have been a stone circle on Kingsdown.

The Romans built the Fosse Way about 2 miles (3 km) to the west. Near the present-day Box church is the site of a Roman country house which was excavated during the 19th century, then in 1902–1903 by Harold Brakspear, and again in 1967–1968. Nothing is visible today, as the remains lie under later buildings, gardens and the churchyard. There was a major rebuilding in the late 3rd or early 4th century which changed it into the largest villa in the Bath area. The villa had one of the richest collections of mosaic floors of any building in Roman Britain, with remains found to date in 20 rooms, there being 42 rooms positively identified in the main villa and 15 more under investigation. Room 26 appears to be a major presence chamber in the manner of that at Trier. A villa such as this would have been the centre of a large estate and the focus of interest for at least six possible subsidiary villas or farmsteads at Ditteridge, Hazelbury and Shockerwick (near Bathford) and those further afield at Colerne, Atworth, and Bradford on Avon.