Heaton Park is a public park in Prestwich Bury, England, covering an area of over 600 acres (242.8 ha). The park includes the grounds of a Grade I listed, neoclassical 18th century country house, Heaton Hall. The hall, remodelled by James Wyatt in 1772, is now only open to the public on an occasional basis as a museum and events venue. It is the biggest park in Greater Manchester, and also one of the largest municipal parks in Europe.

Heaton Park was sold to Manchester City Council in 1902 by the 5th Earl of Wilton. It has one of the United Kingdom's few concrete towers, the Heaton Park BT Tower.

The park was renovated as part of a millennium project partnership between the Heritage Lottery Fund and Manchester City Council at a cost of over £10 million. It contains an 18-hole golf course, a boating lake, an animal farm, a pitch and putt course, a golf driving range, woodlands, ornamental gardens, an observatory, an adventure playground, a Papal monument and a volunteer-run tram system and museum, and is listed Grade II by Historic England. It has the only flat green bowling greens in Manchester, built for the 2002 Commonwealth Games.

The park takes its name from the local area of Great Heaton. Heaton is derived from Old English heah 'high' + tun 'enclosure' or 'settlement'.

Heaton Hall had been owned by the Holland family since the Middle Ages. In 1684, when Sir John Egerton, 3rd Baronet of Wilton, married Elizabeth Holland, the hall came to the Egerton family. In 1772, Sir Thomas Egerton, 7th Baronet (later the 1st Earl of Wilton), commissioned the fashionable architect James Wyatt to design a new home for his young family. Although Wyatt had already established a reputation for himself as an innovative architect, he was only 26 years old and Heaton Hall was his first country house commission. Wyatt's neo-classical masterpiece was built in phases and was mostly completed by 1789.

The park was originally laid out by William Emes in the style of Capability Brown. It has long been used for public events such as Heaton Park races, which were established by the second Earl in 1827. The races were run on a course around the park which included the site of the present day boating lake until 1839 when they moved to Aintree near Liverpool, now the venue for the Grand National. During the 19th century when the railway to Bury was being laid, it stopped short of Heaton Park, as Lord Wilton was not prepared to see his estate disfigured by a railway. As a compromise the line was run under the estate in a tunnel and a railway station opened adjacent to the Whittaker Lane/Bury Old Road entrance in 1879 (now Heaton Park Metrolink station). Consequently, the decision by Lord Wilton to put the hall and park up for sale was greeted with dismay, especially when it became known that the site was being eyed by a property developer. A pressure group was formed to persuade Manchester City Council to purchase it as a museum and municipal park. Alderman Fletcher Moss, a prominent antiquarian was a notable influence in this movement. The park was purchased and opened to the public in 1902. Unfortunately, the council was not prepared to purchase the contents of the hall, so the furniture and paintings were sold by auction. The hall was considered by the council to be of little architectural or historical significance and the saloon was initially used as a tea-room.

During the First World War, the park was used as a training camp for the Pals battalions of the Manchester Regiment, whilst Heaton Hall became a military hospital.

In the Second World War, the park was a camp for the Royal Air Force, where 133,516 aircrew were trained. The park was home to a barrage balloon anchorage and an ackack emplacement. Two "prefab" housing estates and an infants school were built in the south of the park, the houses providing much-needed homes until they were demolished in the 1960s. The school building was used by Manchester City Council until 2012, when it was demolished.