Eden Park is a sports venue in Auckland, New Zealand. It is located three kilometres southwest of the Auckland CBD, on the boundary between the suburbs of Mount Eden and Kingsland. The main stadium has a nominal capacity of 50,000, and is sometimes referred to as New Zealand's national stadium. The stadium is used primarily for rugby union in winter and cricket in summer, and has also hosted rugby league and association football matches, as well as concerts and cultural events. It is owned and operated by the Eden Park Trust Board, whose headquarters are located in the stadium.

Eden Park is considered international rugby union's most difficult ground for visiting sides. New Zealand's national rugby union team, the All Blacks, have been unbeaten at this venue in 52 consecutive test matches stretching back to 1994. Eden Park is the site of the 2021 Te Matatini. It was the site for the 2022 Women's Cricket World Cup, the final of the 2021 Women's Rugby World Cup and staged the opening match of the 2023 FIFA Women's World Cup. In 2011 it hosted pool games, two quarter-finals, both semi-finals and the final of 2011 Rugby World Cup. In doing so it became the first stadium in the world to host two Rugby World Cup finals, having held the inaugural final in 1987. It was a venue for the 2015 Cricket World Cup, which was jointly hosted by Australia and New Zealand. Eden Park also hosted the final of the 1985–1988 Rugby League World Cup.

The land where Eden Park stands was originally swampland, fed by lava caverns created by Maungawhau / Mount Eden and Mount Albert over 30,000 years ago. Tāmaki Māori used the swamp to collect food and materials. In 1845, the area was purchased by Cornish farmer John Walters. Eden Park has been a sports ground since 1900. The park began as a cricket ground in 1903, and was due to the vision of one Harry Ryan, a cricket enthusiast who approached landowner John Walters to lease part of his land as a sports field. In the book Eden Park: A History, the authors write, "Certainly the rough paddock strewn with stones, studded with outcrops of rock and streaked with cowpats, falling away to a boggy trough that filled in a downpour and remained flooded throughout the winter, looked better suited to frog-hunting or duck-shooting than cricket, let alone rugby. Ryan knew or at least imagined better." Much early work on the cricket ground was needed, including clearing the stone walls that had been used to divide farmland, and ongoing drainage issues.

Those who saw Ryan's vision as madness most likely felt vindicated when, in 1907, massive downpours of rain saw the ground submerged in water for a week. The same thing happened again later in the year. By 1910, the ongoing maintenance costs led the Eden District Cricket Club to approach the Auckland Cricket Association to take over running the park. By 1912, the land had been transferred from John Walters to the trustees of the cricket association, backed financially by a number of well-known Auckland businessman. The name 'Eden Park' settled into general usage around 1912, soon after it had been taken over by the association.

In 1913 the park was leased to the Auckland Rugby Football Union, becoming both a summer and winter sporting venue, with the union leasing the venue initially for 21 years. The union agreed to pay to build the park's first grandstand, erected in 1913 to hold an audience of 2,500, and later followed by a second members' stand built in 1914. In 1914, the first international cricket match was held, with Auckland hosting Australia. The first rugby match played at the venue was a seven-a-side series on 9 May 1914, and the first representative match was played on 5 September, against Wellington. Drainage issues ceased to be a regular issue for Kingsland and Eden Park in the 1920s, after which the park began to flourish. The first rugby test was held on 27 August 1921, when South Africa beat New Zealand 5–9 before a crowd of 40,000. The Auckland Rugby Football Union officially made Eden Park its home in 1925, and in 1926, a trust was set up to manage Eden Park primarily for the benefit of Auckland Cricket and Auckland Rugby.

In 1930, the ground hosted its inaugural British and Irish Lions matches as part of the 1930 British Lions tour to New Zealand and Australia. Matches were held against Auckland and New Zealand sides, both won by the home sides with an attendance of 45,000 at the latter. The ground hosted its first match between New Zealand and Australia as part of the 1931 Australia rugby union tour of New Zealand. New Zealand won 20–13. In 1933, New Zealand hosted England in the first cricket test match, where Wally Hammond set an individual test batting record of 336 not out.

Eden Park served as the opening ceremony and athletics venue for the 1950 British Empire Games, when the western part of the grounds were first opened. In 1955, New Zealand hosted England in the second test match of their 1954–55 Tour of New Zealand. During the same year, the New Zealand Parliament passed the Eden Park Trust Act, enshrining the governance structure of the park until 2009. By 1956, the West Stand was completed, followed by the South Stand in 1958. New Zealand won its first cricket test match against the West Indies as part of the 1955–56 West Indies Tour of New Zealand. The ground hosted its third rugby international between New Zealand and South Africa. New Zealand won 11 – 5 before a record crowd of 63,000. The British and Irish Lions returned for the third time in the 1959 British Lions tour to Australia and New Zealand with matches against Auckland and New Zealand. The visitors win both, their first test match win at the ground.

During the 1960s and 70s, further large scale events were held at the venue, including 1961 French tour of New Zealand and Australia, the 1963 England tour of New Zealand, the 1969 Wales rugby union tour of Oceania, a welcoming party for the royal family during the 1970 New Zealand Royal Visit Honours, the Australian tour of New Zealand (1973–74), and a gymnastic display held by touring Russian gymnasts including Olga Korbut. During the 1975 Scotland rugby union tour of New Zealand, both teams famously played during a downpour on a completely saturated pitch, before the one-off test had to be cancelled as the drainage system was unable to cope with the flooding.