Adelaide city centre (Kaurna: Tarndanya) is the city centre of Greater Adelaide, the capital city of South Australia. It is known by locals simply as "the City" or "Town" to distinguish it from Greater Adelaide and from the City of Adelaide local government area. The residential population was 18,202 in the 2021 census, with a local worker population of 130,404.
Adelaide city centre was planned in 1837 on a greenfield site following a grid layout, with streets running at right angles to each other. It covers an area of 4.33 square kilometres (1.67 square miles) and is surrounded by 6.68 square kilometres (2.58 square miles) of park lands. Within the city are five parks: Victoria Square in the exact centre and four other, smaller parks.