The Semington Brook, a westward-flowing tributary of the Avon, forms the east and north boundaries of the parish. Sometime after 1818, the central part of the northern boundary was realigned to follow the Kennet and Avon Canal. Semington village developed along the main road from Melksham to Westbury which became the A350 primary route. In 2004 a bypass was opened, taking the A350 east of the village. Little Marsh is a hamlet south of Semington, along the old course of the A350. Littleton is no longer populated, and the only area currently designated as belonging to Littleton is the roundabout at the A350 and A361 road crossing.
Governance
The civil parish elects a parish council. It is in the area of Wiltshire Councilunitary authority, which is responsible for all significant local government functions. The village is the most populous area of 'Summerham and Seend' electoral ward. This ward starts in the northwest at Semington, stretches south to Steeple Ashton then northeast to Seend. The total ward population at the 2011 census was 4,264.
History
Anciently, Semington and Littleton were each tithings of Steeple Ashton parish. In the late 19th century the civil parish of Semington was formed from the two tithings, and in 1894 the ancient parish of Whaddon was added to it. Whaddon was transferred to Hilperton in the late 20th century. The population of the parish was in the range 400 to 500 for many years, from the 1841 census to that of 1931. Numbers then gradually increased to reach 930 in 2011.
Canals
The Kennet and Avon Canal crosses marshy ground on an embankment on the northern edge of the village. The two Semington locks were built between 1794 and 1802 under the supervision of the engineer John Rennie. They have a combined rise/fall of 16 ft 1 in. The two locks at Semington are known as Buckley's and Barrett's. Next to the locks is the point at which the Wilts & Berks Canal left the Kennet and Avon. The Wilts & Berks is disused but the Wilts & Berks Canal Trust is restoring it. East of the locks, the canal travels across the 2004 Semington Aqueduct, built to allow the A350 to bypass Semington village. Another aqueduct carries the canal over Semington Brook. The canal, towpath and adjacent hedges are good for wildlife and in August 2007 water voles were seen.
Former railway
The Devizes Branch Line was built north of the village in 1857. A small station was opened in 1906 where the railway crossed both the A350 and the Wilts & Berks canal; the station and the line were closed in 1966.
Just west of the village is the former St George's Hospital, built in 1836–38 as a workhouse for the Melksham poor law union to designs of H. E. Kendall. The nine-bay north front in classical style has two storeys and a three-bay pediment; behind this, further ranges of one, two and three storeys surround four courtyards. The front is limestone ashlar and the rear ranges are dressed limestone. Pevsner writes: "It is typical of the coming of the Victorian age how the classical and Grecian motifs get clumsy and extremely heavy". In 1988, when the building was recorded as Grade II listed, it was in use as a hospital for the mentally handicapped. Today it is largely in residential use, while a charity providing advice to disabled people occupies the ground floor of one building.
World War II
During the Second World War, Semington was on GHQ Line which followed the path of the canal. Semington was designated as a centre of resistance: extensive anti-tank ditches were constructed to the east, south, and west of the village, these were overlooked by a number of pillboxes. The defences were constructed as a part of British anti-invasion preparations.
Parish church
The Church of England parish church of St George is a Grade II listed building. It dates from the 15th century and was largely rebuilt in 1860. Anciently a chapelry of Steeple Ashton, Semington was made an independent parish in 2000, and today the parish is part of the Canalside Benefice alongside parishes in Hilperton and Whaddon.
Amenities
Within the village there are over 500 houses, a primary school, a village hall, public tennis courts and a park for children. Semington has a pub, The Somerset Arms, an 18th-century building. National Cycle Route 4 follows the canal towpath, and at the road bridge just north of Semington village, route 403 branches north to Melksham and beyond.
