Suburb · NSW
Thornleigh, NSW
Postcode, council area, planning zones and 2021 Census facts for Thornleigh, New South Wales, 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
Thornleigh at a glance
| State | New South Wales |
|---|---|
| Postcode | 2120 |
| Local government area | Hornsby |
| ABS suburb code (SAL 2021) | 13866 |
Planning zones in Thornleigh
- R2 — Low Density Residential69%
- RE1 — Public Recreation11%
- E4 — General Industrial6%
- 4 other zones12%
The three largest zones are coloured; every zone covering at least 1% of Thornleigh is listed below. Boundaries are the NSW 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.
- R2 — Low Density Residential69% of the suburb
- RE1 — Public Recreation11% of the suburb
- E4 — General Industrial6% of the suburb
- C1 — National Parks and Nature Reserves5% of the suburb
- SP2 — Infrastructure3% of the suburb
- E3 — Productivity Support3% of the suburb
- R3 — Medium Density Residential1% of the suburb
Thornleigh in the 2021 Census
| Population | 8,898 |
|---|---|
| Median age | 40 years |
| Median weekly household income | $2,681 |
| Median weekly rent | $530 |
| Median monthly mortgage repayment | $2,800 |
| Average household size | 2.9 people |
Source: Australian Bureau of Statistics, Census of Population and Housing, 2021
Other suburbs in Hornsby
- AsquithNSW 2077
- GalstonNSW 2159
- Hornsby HeightsNSW 2077
- WestleighNSW 2120
- Allambie HeightsNSW 2100
- Anna BayNSW 2316
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)
- Zone codes and names: pp.planningportal.nsw.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 Thornleigh
Run an address in Thornleigh through Struqt for that block's zone controls, overlays and a feasibility read, written by registered architects and backed by government data.