The City of Tea Tree Gully is a local council in the Australian state of South Australia, in the outer north-eastern suburbs of Adelaide. The major business district in the city is at Modbury, where Westfield Tea Tree Plaza, the Civic Centre and the library are located. Howard, Lord Florey, Australian pathologist and co-discoverer of penicillin, was a resident of the City of Tea Tree Gully. Suburbs and post codes Banksia Park – 5091 Dernancourt – 5075 Fairview Park – 5126 Gilles Plains – 5086 Golden Grove – 5125 Gould Creek – 5114 Greenwith – 5125 Gulfview Heights – 5096 Highbury – 5089 Holden Hill – 5088 Hope Valley – 5090 Houghton – 5131 Modbury – 5092 Modbury Heights – 5092 Modbury North – 5092 Para Hills – 5096 Redwood Park – 5097 Ridgehaven – 5097 St Agnes – 5097 Salisbury East – 5109 Surrey Downs – 5126 Tea Tree Gully – 5091 Upper Hermitage – 5131 Valley View – 5093 Vista – 5091 Wynn Vale – 5127 Yatala Vale – 5126 Council The current council (as of Feb 2023): History The Tea Tree gully itself passes through the Adelaide foothills roughly marking the easiest path eastwards from Grand Junction Road to Gumeracha. The 1850s settlement at the entrance to the gully (approximately where North East Road enters the foothills) was known as the village of 'Steventon' after a local resident, John Stevens, who was a major landowner in the area. The name Steventon is retained as one of the electoral wards of the City of Tea Tree Gully. The council was originally proclaimed in October 1858 as the District Council of Tea Tree Gully, when the northern half of the District Council of Highercombe, which had been created in 1853, successfully seceded to form its own municipality. In the early 1930s, the two councils were considered unviable, being very small in relative size and population. The District Council of Highercombe was included in a Local Government Commission list of 53 local councils with annual revenue of less than £2000. Following the commission recommendation, the two councils were recombined under the name Tea Tree Gully in May 1935. It inherited the former 1855 Highercombe council chambers, which had been built in Tea Tree Gully, and used that building until 1967. The Old Tea Tree Gully Council Chambers survive today and are listed on the South Australian Heritage Register, having been