Spelthorne is a local government district with borough status in Surrey, England. Its council is based in Staines-upon-Thames; other settlements in the area include Ashford, Sunbury-on-Thames, Shepperton, Stanwell and Laleham. It is named after the medieval Spelthorne Hundred which had covered the area.

The borough is largely urban; although outside the boundaries of Greater London, it is almost entirely inside the M25 motorway which encircles London. The borough contains several large reservoirs, including the Wraysbury Reservoir, Staines Reservoirs and Queen Mary Reservoir, which all supply fresh water to London and surrounding areas.

The neighbouring districts are Elmbridge, Runnymede, Windsor and Maidenhead, Slough, Hillingdon, Hounslow and Richmond upon Thames, the latter three being London boroughs.

The district was created on 1 April 1974 under the Local Government Act 1972, covering two former districts which were both abolished at the same time:^[3]

• Staines Urban District
• Sunbury-on-Thames Urban District

These two urban districts had been part of Middlesex prior to 1965, when they had been transferred to Surrey on the creation of Greater London.^[4] The new district was named after the medieval hundred of Spelthorne, which had covered the area plus adjoining parts of modern Greater London.^[5][6] The district was awarded borough status from its creation, allowing the chair of the council to take the title of mayor.^[7]

The borough ceded a small amount of land in 1995, when Poyle was transferred to Slough.^[8] The Spelthorne area was included in the Metropolitan Police District from 1840 until 2000, when it passed to Surrey Police.^[9][10]

Spelthorne remains part of the Church of England Diocese of London and the Roman Catholic Archdiocese of Westminster. The rest of Surrey falls into the Anglican dioceses of Guildford and Southwark, and the Roman Catholic diocese of Arundel and Brighton.

Floods in 2014 caused internal damage to 891 (or 2.2%) of homes in Spelthorne due to record rainfall causing Thames flooding. This compared to internal damage to more than 30% of homes in the neighbouring settlement of Wraysbury in the borough of Windsor and Maidenhead.^[11]

In 2014 a campaign group of local business leaders called for the borough – along with others close to the capital – to be transferred from the county of Surrey to Greater London. The proposal was generally opposed by the public and was not pursued.^[12]

Spelthorne Borough Council provides district-level services. County-level services are provided by Surrey County Council.^[14] There are no civil parishes in the borough, which is an unparished area.^[15]

On 27 February 2024, Spelthorne Borough Council unveiled their Corporate Plan for 2024-2028, highlighting their key priorities for the next few years. ^[16]

As of 2023, the council had £1.1 billion in borrowing, with the highest borrowing to income ratio of any council in England.^[17]

The borough council estimates it has 3.0 square kilometres (750 acres) of parks, including, from Shepperton upstream, the Thames Path.^[28] Its sixteen main parks with recreational/sports facilities^[29] are supplemented by small greens and linear parks, such as those by the River Thames. The largest parks have woodland and flowering meadow. These support diverse and rare grasses, invertebrates and birds on a rich alluvial soil: Laleham Park and Sunbury Park.

The final great reduction of private parks was that of the early 20th century, a sale of Laleham manor demesne by the Earl of Lucan. The Jockey Club, as owner of Kempton Park Racecourse, is successor to the domain of the lords of the manor of Kempton – about 40% is a large nature reserve with its internal two large ponds abutting the Kempton Park Reservoirs Site of Special Scientific Interest, on Thames flood meadow.

The borough has five reservoirs, covering more than 15% of land, which apart from their main use of ensuring a stable and energy-efficient drinking water supply to London, are bird reserves and in the case of the Queen Mary Reservoir, a sailing training centre. A similar percentage of land is covered by other lakes, mostly former gravel pits no longer pumped out of water. The 10-kilometre (6.2 mi) River Ash, Surrey starts and ends in the borough.

Of recognised high importance to nature is Staines Moor, which alongside Sheepwalk Lake and wetlands, Shepperton are the sites of special scientific interest (SSSI).^[30]

Hospitality is widespread in the riverside towns. Sunbury and Staines town hubs are within 6 miles (10 km) of top UK attractions such as Windsor Castle, Thorpe Park, Hampton Court, Twickenham Rugby Stadium and Kew Gardens.

Staines is the borough's main station, being served by South Western Railway services to London Waterloo, Reading and Windsor & Eton Riverside.^[31]

A January 2005 enhanced base map study by the Office for National Statistics managed to classify 50.8 square kilometres (19.6 sq mi), 99% of land in Spelthorne. The findings of this study showed that the land use in Spelthorne was as follows:^[32]

Two Rivers Retail Park and Elmsleigh Shopping Centre in Staines-upon-Thames. In 2016 there were:

• 5,365 businesses (including retailers) in Spelthorne.
• a 10 screen cinema with Dolby Digital Surround Sound.
• 12 miles of river frontage for picturesque walks.
• 65% green belt land or water – a green and blue buffer offsetting local major economic contributors Heathrow Airport and the UK motorway network

The district has two publicly sponsored leisure centres and two private clubs with pools, and two without pools:

• Sunbury and Staines Leisure Centres
• the Thames Club Staines
• Nuffield Health Sunbury
• Pure Gym Staines
• The Gym Sunbury

It has two golf courses.

School-taught English sports: cricket and football are played at many pitches; the third, rugby union is played at the London Irish Hazelwood Centre sharing pitches with London Irish Amateur Rugby Football Club in Sunbury. Staines Rugby Club play next to the Feltham-Hanworth-Sunbury tripoint in Lower Feltham.

Spelthorne has two football clubs – semi- or non-professional – as the top men's sides compete in the lower leagues:

Spelthorne hosts one of the county's major archery clubs (Spelthorne Archers) and five lawn bowls clubs.

Fishing is open to all, subject to rod licensing,^[33] from the Thames Path National Trail and adjoining islands in Laleham and Staines as well as at lakes in Shepperton and Ashford. One rowing club is in the borough, at Laleham, with others nearby including Staines Boat Club across Staines Bridge from the town centre which organises a regatta to Penton Hook in July for racing shells. Sunbury Skiff and Punting Club is the newest of all six which are quite clustered on the Thames, several of which incorporate dongola racing, dragon boat racing and canoeing. It organises an August regatta with fireworks.

In May the Staines 10k charity run takes place organised by two local running/'strolling' clubs and the council. One of the more than 720 nationwide 5,000-metre running competitions of the major organiser is around the rugby union club in its borders, which has a small nature reserve it owns to one end.^[34]

Other venues hosting annual events in a range of sports are Kempton Park Racecourse and Staines Lammas Park.

The stated proportion of land that is absorbed by domestic dwellings tends to be housing with gardens forming suburbs to London and otherwise has mid rise urban town centres with exceptional offices (in Staines-upon-Thames) and apartments (in Sunbury-on-Thames) which are high rise, including a minority of the social housing.

The non-urban parts, inclusive of the embanked water retaining reservoirs, are today for the most part Spelthorne's parks and lakes. The bulk of the rest is mostly narrow buffering land being arable farming, horse-grazing meadows and sheep grazing on the reservoir embankments and fringes with Green Belt legal status. Shopping is available in each of the towns and in the village of Shepperton but not in the other small villages which are connected by road and bus to the nearby towns. Kempton Park Racecourse and Shepperton Studios are in Spelthorne. Staines is the largest town and has local government and judicial buildings. Each of the towns has libraries and schools.

In July 2017, Shepperton was named as the UK's most courteous town by the National Campaign for Courtesy.

• Melun, France.
• Grand Port, Mauritius.^[38]

• Spelthorne (UK Parliament constituency)