Edinburgh Zoo (Scottish Gaelic: Sù Dhùn Èideann), formerly the Scottish National Zoological Park, is an 82-acre (33 ha) non-profit zoological park in the Corstorphine area of Edinburgh, Scotland.

The zoo is positioned on the south-facing slopes of Corstorphine Hill, giving extensive views of the city. Established in 1913, and owned by the Royal Zoological Society of Scotland, it receives over 600,000 visitors a year, which makes it one of Scotland's most popular paid-for tourist attractions. As well as catering for tourists and locals, the zoo is involved in many scientific pursuits, such as captive breeding of endangered animals, researching into animal behaviour, and active participation in various conservation programmes around the world.

Edinburgh Zoo was the first zoo in the world to house and breed penguins. It is the only zoo in Britain to house Queensland koalas and, until December 2023, giant pandas. The zoo is a member of the British and Irish Association of Zoos and Aquariums (BIAZA), the European Association of Zoos and Aquaria (EAZA), the World Association of Zoos and Aquariums (WAZA), and the Association of Scottish Visitor Attractions. It has also been granted four stars by the Scottish Tourism Board. The zoo gardens boast one of the most diverse tree collections in the Lothians.

The Royal Zoological Society of Scotland (RZSS) was founded as a registered charity in 1909 by an Edinburgh lawyer, Thomas Hailing Gillespie. The Corstorphine Hill site was purchased by the Society with help from the Edinburgh Town Council in early 1913. Gillespie's vision of what a zoological park should be was modelled after the 'open design' of Tierpark Hagenbeck in Hamburg, a zoo which promoted a more spacious and natural environment for the animals, and stood in stark contrast to the steel cages typical of the menageries built during the Victorian era. The design and layout were largely the product of Patrick Geddes and his son-in-law Frank Mears but Sir Robert Lorimer was involved in some of the more architectural elements including the remodelling of Corstorphine House at its centre.

The Scottish National Zoological Park was opened to the public in 1913 and was incorporated by Royal Charter later that year. In 1948, following a visit by His Majesty King George VI, the Society was granted the privilege of adding the prefix 'Royal' to its name. It remains the only zoo with a Royal Charter in the United Kingdom.

Edinburgh Zoo's long association with penguins began in January 1914, with the arrival of three king penguins from the Christian Salvesen whaling expedition which docked in Leith. The subsequent successful hatching of a king penguin chick in 1919 was the first penguin to be hatched in captivity. These were the first penguins to be seen outside of the South Atlantic anywhere in the world. The now famous daily penguin parade started by accident in 1950 with the escape of several birds. This proved so popular with visitors and the penguins that it was a daily feature of the zoo until stopped by first COVID and then avian influenza.

After Tom Gillespie retired, Gilbert D. Fisher was appointed director-secretary of the zoo in 1956. He held the post till he retired in 1971.

In 1986, the Society acquired the Highland Wildlife Park at Kingussie, 30 miles (48 km) south of Inverness. The zoo and the park work together in providing the most appropriate captive habitat possible in Scotland. Public visitation trips between both sites are organised frequently by the RZSS.