Lydiard Tregoze is a small village and civil parish on the western edge of Swindon in the county of Wiltshire, in the south-west of England.

Lydiard Tregoze is mentioned in Domesday Book as a manor belonging to Alfred of Marlborough, Baron of Ewyas, a powerful Saxon nobleman who retains his lands after the Conquest, and a Tenant-in-Chief to King William I of England.

Near Royal Wootton Bassett, the parish of Lydiard Tregoze was part of the Kingsbridge Hundred, while its village originally centred on the medieval parish church of St Mary and the nearby manor house, Lydiard House, which came to be the home of the St John family, Viscounts Bolingbroke.

His marriage to her mother, Margaret Beauchamp of Bletso, produced six children to whom she remained close throughout her life, and this gave the St Johns considerable influence at Court in the early decades of the Tudor dynasty.

[4] John Bartholomew's Gazetteer of the British Isles (1887) describes Lydiard Tregoze as: "Liddiard Tregooze, par.

[16] Nikolaus Pevsner wrote "Not a big church, but cram-full of enjoyable furnishings, richer than any other of similar size in the country".

In 1943, the local authority, the Corporation of Swindon, bought the then dilapidated house and its overgrown park from the estate trustees.

The parkland is operated as a country park and entertainment venue; the house is open to the public in the summer and now has a significant art collection, including fine-painted panels by Lady Diana Beauclerk.

The Great Western Main Line railway follows a similar route; there are no local stations, the nearest being Swindon.

Between 1840 and 1841, as the railway was being built in stages from London, a temporary terminus known as Wootton Bassett Road was at Hay Lane.

[29] The M4 motorway also crosses the parish, and its junction 16 provides routes to West Swindon, Royal Wootton Bassett and Wroughton.