Suburb · SA
Flagstaff Hill, SA
Postcode, council area, planning zones and 2021 Census facts for Flagstaff Hill, South Australia, from government sources. What those zones allow on a particular block is in the report.
Government data only, no interpretation · Data as at 6 October 2026 · Sources and licences
Flagstaff Hill at a glance
| State | South Australia |
|---|---|
| Postcode | 5159 |
| Local government area | City of Onkaparinga |
| ABS suburb code (SAL 2021) | 40444 |
Planning zones in Flagstaff Hill
- HN — Hills Neighbourhood42%
- GN — General Neighbourhood26%
- Con — Conservation23%
- 2 other zones9%
The three largest zones are coloured; every zone covering at least 1% of Flagstaff Hill is listed below. Boundaries are the SA government’s published zone layer, clipped to the Australian Bureau of Statistics suburb boundary. A block’s own zone is read from its parcel, not from its suburb.
Road names © OpenStreetMap contributors.
- HN — Hills Neighbourhood42% of the suburb
- GN — General Neighbourhood26% of the suburb
- Con — Conservation23% of the suburb
- HF — Hills Face7% of the suburb
- OS — Open Space2% of the suburb
Flagstaff Hill in the 2021 Census
| Population | 10,184 |
|---|---|
| Median age | 43 years |
| Median weekly household income | $2,080 |
| Median weekly rent | $385 |
| Median monthly mortgage repayment | $1,733 |
| Average household size | 2.7 people |
Source: Australian Bureau of Statistics, Census of Population and Housing, 2021
Median sale prices in Flagstaff Hill
| Median house price | $1,015,500 |
|---|
Source: Government of South Australia open data, Q4 2025 (CC BY 4.0). A published median, not a valuation.
Other suburbs in City of Onkaparinga
- Aberfoyle ParkSA 5159
- Cherry GardensSA 5157
- Christie DownsSA 5164
- Hackham WestSA 5163
- KangarillaSA 5157
- Morphett ValeSA 5162
Related guides
Sources
- Suburb and postcode boundaries: Australian Bureau of Statistics, Australian Statistical Geography Standard (ASGS) Edition 3, 2021, CC BY 4.0
- Source: Australian Bureau of Statistics, Census of Population and Housing, 2021 (CC BY 4.0)
- Median sale prices: Government of South Australia open data, Q4 2025 (CC BY 4.0)
- Zone codes and names: data.sa.gov.au (CC-BY 4.0)
Full list of data sources and licences: struqt.com.au/sources.
See what our architects make of a block in Flagstaff Hill
Run an address in Flagstaff Hill through Struqt for that block's zone controls, overlays and a feasibility read, written by registered architects and backed by government data.