Seaforth (NSW)
NSWSeaforth (NSW) is a declining suburb in NSW with 7,384 residents.
- SAL code
- 13524
- SA2
- 122011418
- Population
- 7,384
- LGA
- Northern Beaches
Seaforth (NSW), NSW had 7,384 residents at the 2021 Census, with the broader statistical area showing a 0.8% decline over the last five years. The predominant age group is 45-54 years, and the median age sits at 42. Households are most often couples with children, and those with a mortgage repay a median of $4,333 a month. Around 83.6% of homes are owner-occupied, with the largest single tenure being owned with a mortgage at 44.3%. Most dwellings are separate houses, making up 87.3% of the suburb's housing stock. The suburb has 10 parks and reserves mapped within its boundary. Source: ABS Census 2021 and Estimated Resident Population, with amenity counts from state Open Data and OpenStreetMap.
Population
?7,384
Suburb · Census 2021
5-Year Growth
-0.8%
3yr: +1.6% · 10yr: -0.1%
SA2 · 5yr
Household Income
$4,184/wk
Suburb · Census 2021 median
Median Age
42
Suburb · Census 2021
Socio-Economic Index
?10/10
SA2 · least disadvantaged
Unemployment
?3.8%
SA4 · Q4 2025
Schools
1
1 primary
Hospitals
No data for this suburb
Childcare services
?8
7 long day, 1 OSHC
Parks & green space
?10
Parks, reserves
Transport stops
?58
GTFS stops
Dwelling approvals
?32
Northern Beaches · Feb 2026
Median Weekly Rent
Based on NSW rental bond lodgements, aggregated at postcode level. All SALs sharing this postcode show the same median.
Median House Sale Price
Source: state Valuer-General (suburb-level quarterly medians).
→ Calculate stamp duty on this suburb's median price→ Estimate mortgage repayments→ Calculate rental yield (price + median rent)
Population over time — Balgowlah - Clontarf - Seaforth (SA2)
ABS publishes annual estimates only at SA2; Seaforth (NSW) suburb alone is ~7,384 (Census 2021).
Growth at a Glance
Population grew from 18,445 to 20,936 over 24 years, averaging 0.5% per year.
Schools
1 in suburbGovernment school catchment
Intake zonePrimary
Seaforth PS75.2%
- Balgowlah NPS 24.5%
- Balgowlah Hts PS 0.1%
- Manly WPS 0.1%
Secondary
NBSC Balgowlah Boys100.0%
- NBSC Mackellar Girls 100.0%
Source: NSW Department of Education — School Intake Zones. Boundaries can be amended without notice; confirm with the school before relying on enrolment.
Profile
Census snapshot
Housing
Public housing 1.8%Almost entirely detached houses (87.3%), owner-occupied (84%).
Dwelling mix
Tenure
Number of bedrooms
Bushfire & flood risk
Hazard data is not yet available for NSW.
Source when available: NSW Rural Fire Service (BFPL) and NSW DPHI EPI Flood.
Planning zones
9 zones in suburb| Code | Zone | % covered | Area |
|---|---|---|---|
| R2 | ZoneResidential | 59.9% | 1.86 km² |
| C1 | ZoneEnvironmental | 10.2% | 0.32 km² |
| RE1 | ZoneRecreation | 8.9% | 0.28 km² |
| C3 | ZoneEnvironmental | 6.0% | 0.19 km² |
| SP2 | ZoneSpecial use | 5.9% | 0.18 km² |
| C2 | ZoneEnvironmental | 3.3% | 0.10 km² |
| R1 | ZoneResidential | 2.8% | 0.09 km² |
| E1 | ZoneEnvironmental | 1.3% | 0.04 km² |
| RE2 | ZoneRecreation | 0.4% | 0.01 km² |
Source: NSW DPHI EPI Land Zoning (ZONE_NSW/2026-04-29/1eccf1a530fa1be5) · As of Apr 2026. Zone boundaries are amended periodically; verify the exact property with the relevant council before relying on permitted use.