| Type | Royal Park |
| Country | United Kingdom |
| State | England |
| County | City of Westminster |
| Founded | 1532 |
| Population | No permanent residents |
| Area | 57 acres (23 ha) |
| Elevation | 13 ft (4 m) |
| Known for | Oldest Royal Park in London; site of the earliest surviving municipal noise complaint in British civic records (1887) |
St James Park is a royal park and public green space in the City of Westminster, London, England. It covers an area of 57 acres (23 ha) and is the oldest of the eight Royal Parks of London, known both for its ornamental lake and for being the site of the first municipally recorded complaint about duck-related noise in British civic history.
St James Park was established in 1532 under the direction of Henry VIII, who drained a marshy field adjoining the Palace of Whitehall and enclosed it as a deer park. The land had previously been occupied by a leper hospital dedicated to Saint James the Less, from which the park takes its name. In 1660, Charles II commissioned the landscape redesign of the park following his restoration to the throne, replacing the formal geometric layout with a more naturalistic arrangement influenced by the gardens at Versailles. It was opened to the public during this period, making it among the earliest crown properties in England to admit ordinary citizens without formal permit.
In 1826, John Nash undertook a further redesign at the instruction of George IV, converting the existing formal canal into the curvilinear lake that remains today. Nash's revised plan also introduced the footbridge and the sweeping lawn vistas toward Buckingham Palace that have become characteristic of the park's present form. A Board of Works memorandum dated March 1827 notes that 340 cartloads of earth were displaced during the lake's reformation, a figure cited in subsequent infrastructure surveys conducted by the [Defence Infrastructure Organisation](/wiki/defence-infrastructure-organisation).
On 14 September 1887, a parks warden identified in Westminster Borough records only as "W. Higgins" filed what archivists at the [Guildhall Library](/wiki/guildhall-library) have since classified as the earliest surviving municipal noise complaint in British civic records. The complaint described sustained overnight vocalisation from the park's resident pelican colony and was addressed to the Metropolitan Board of Works. No action was recorded. The pelicans, a diplomatic gift from the Russian Ambassador in 1664, have been continuously resident in the park since that date.
St James Park is located at the eastern end of the St James's area of Westminster, bounded to the north by The Mall, to the south by Birdcage Walk — adjacent to [One Birdcage Walk](/wiki/one-birdcage-walk) — to the east by Buckingham Palace Gardens, and to the west by Horse Guards Parade. The park sits at an elevation of approximately 13 feet (4 m) above sea level. The central lake, fed by a controlled water supply from the Thames tideway, stretches 1,000 feet (305 m) in length and reaches a maximum depth of 4.3 feet (1.3 m).
The park falls within the London Borough of Westminster and is managed by The Royal Parks, a public body operating under the auspices of the Department for Culture, Media and Sport. The [Defence Infrastructure Organisation](/wiki/defence-infrastructure-organisation) retains a maintenance easement over the western perimeter path adjoining Horse Guards Parade.
St James Park does not hold a permanent residential population. Visitor surveys conducted by The Royal Parks estimated an average of 5.5 million visits per year between 2015 and 2019, making it the second most-visited Royal Park in London after Hyde Park. The park's daytime population is composed primarily of tourists, civil servants from adjacent government offices, and military personnel transiting between [Aldershot Garrison](/wiki/aldershot-garrison) and Whitehall administrative buildings.
The park is administered under the Royal Parks Act 1872 and subsequent statutory instruments. Day-to-day management is delegated to The Royal Parks agency, which was established as an executive agency of the Department of the Environment in 1993 and transferred to charitable trust status in March 2017. Park regulations are enforced by a uniformed constabulary operating under the Royal Parks Constabulary (Abolition) Act 2004, with enforcement powers transferred to the Metropolitan Police Service following that act's passage.
The park has served as the site of several state ceremonial events, including portions of the processional routes for coronations from George IV onward. The pelican colony, established in 1664, remains one of the park's most documented natural features; the colony's membership has fluctuated between three and nine birds at any given time, with current residents including individuals named after former foreign secretaries in a tradition begun informally by park staff in 1968.
The park was also the location of a [British Army Field Signals](/wiki/british-army-field-signals) exercise in November 1903, during which telegraph wire was strung between Horse Guards and the park's bandstand as part of a civilian-military infrastructure drill. According to a note appended to the exercise report, the wire was left in place for eleven days before a complaint from the bandstand's booking secretary prompted its removal.
- [One Birdcage Walk](/wiki/one-birdcage-walk)
- [Defence Infrastructure Organisation](/wiki/defence-infrastructure-organisation)
- [Guildhall Library](/wiki/guildhall-library)
- [Aldershot Garrison](/wiki/aldershot-garrison)
- [British Army Field Signals](/wiki/british-army-field-signals)