The Adelaide Park Lands comprise the figure-eight configuration of land, spanning both banks of the River Torrens between Hackney and Thebarton, which encloses and separates the City of Adelaide area (including both the Adelaide city centre and North Adelaide) from the surrounding suburbia of greater metropolitan Adelaide, the capital city of South Australia. They were laid out by Colonel William Light in his design for the city, and originally consisted of "exclusive of for a public cemetery". One copy of Light's plan shows areas for a cemetery and a Post and Telegraph Store on West Terrace, a small Government Domain and Barracks on the central part of North Terrace, a hospital on East Terrace, a Botanical Garden on the River Torrens west of North Adelaide, and a school and a storehouse south-west of North Adelaide.
Over the years there has been constant encroachment on the Park Lands by the state government and others. Soon after their declaration in 1837, "were lost to 'Government Reserves'". In 1902, The Herald noted that a total area of had been taken from park lands. In 2018, the loss is about .
The part of the Park Lands not in the "Government Reserves" have been managed and maintained by the Adelaide City Council since 1852, and since February 2007, the Adelaide Park Lands Authority has advised council and government.
On 7 November 2008 the Federal Minister for Environment, Heritage and the Arts, Peter Garrett, announced that the Adelaide Park Lands had been entered in the Australian National Heritage List as "an enduring treasure for the people of South Australia and the nation as a whole". In fact, large areas of the Adelaide Park Lands along the north side of the complete length of North Tce, and along the north side of Port Road from West Terrace to the Thebarton Police Barracks, (in Parks 11, 12, 26 and 27), and also the rail reserves, (in Parks 25, 26 and 27), were excluded from the "Adelaide Park Lands and City Layout National Heritage Place" listing.