Grey Lynn is an inner suburb of Auckland, New Zealand, located 3 kilometres (1.9 mi) to the west of the city centre. Originally a separate borough, Grey Lynn amalgamated with Auckland City in 1914.

Grey Lynn is centred on Grey Lynn Park, which was not part of the original subdivision of 1883, since the land was too steep and too wet for house construction. In 1915, the land was drained and levelled for playing fields. The park is home to the annual Grey Lynn Park Festival, which attracts around 100,000 visitors on the third Saturday in November.

Prior to the arrival of Europeans in Auckland, Grey Lynn was a frequent transit point with abundant food sources and access to freshwater. Food sources included several kūmara plantations in Grey Lynn, on the hill slopes above Opoutukeha, Coxs Creek. In the late 17th or early 18th century, there were a series of raids in the area led by Kāwharu (Tainui), known as Raupatu Tīhore. Kāwharu reportedly rested his head on the ridge that is now the location of Surrey Crescent, leading to it being called Te Rae o Kāwharu (Kāwharu's brow), which was later adopted as the Māori name of Grey Lynn School.

Grey Lynn was part of the first 3000-acre block of land gifted by Ngāti Whātua Ōrākei in October 1840. The Grey Lynn area was originally known as Newton until being renamed in August 1899.

In 1844 and 1845, blocks of land in the western part of Grey Lynn were auctioned off. In the early 1840s, John Monteforte bought Surrey Hills, which encompassed much of the land from Ponsonby to Richmond Roads, totalling 198 acres (80 hectares). In 1847, Thomas Crummer and James Williamson bought Surrey Hills and eventually owned all the land bounded by Ponsonby, Great North and Richmond Roads, except for "three blocks at the northern end where Tutanekai, Hakanoa and Sackville streets run," the majority of modern Grey Lynn.

The Surrey Hills was leased from the early 1840s to the mid-1880s, and housed a farm and a sheep run. Notably, in 1871, Frank Lawry leased part of the Surrey Hills and created a dairy farm. Following Crummer's death, Williamson bought the Crummer's children's share in Surrey Hills. When Williamson was facing financial hardship in the early 1880s, Surrey Hills was bought by the Auckland Agricultural Company.

Grey Lynn had a number of brickyards, particularly along the Great North Road. In 1871, Thomas Faulder was appointed night soil contractor for Auckland, and used his land between Surrey Crescent and Tuarangi Road for its disposal. During the early 1870s, there were numerous complaints over the use of this land for this purpose, including to the Central Board of Health in 1874. The depot was relocated to Avondale in 1875. In 1906, James Tattersfield set up a mattress factory on the corner of Sackville and Richmond Road. The factory was later expanded to produce carpets.

In 1883, the 127 hectares (310 acres) that was the Surrey Hills Estate was subdivided for residential purposes, the largest subdivision in the area at the time. In 1885, there was a depression in the economy which slowed building on the estate. In the late 1890s-early 1900s, building resumed and, by 1903, there were 1040 dwellings. With the extensions of the tramlines to West Lynn in 1910, there was another wave of subdivisions. There was also the development of shops - notably on Great North Road, Williamson Avenue and Tuarangi Road.