Semaphore

Semaphore is a growing suburb in SA with 2,749 residents.

SAL code: 41329
SA2: 404021099
Population: 2,749
LGA: Port Adelaide Enfield

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Semaphore suburb boundary

Semaphore, SA had 2,749 residents at the 2021 Census, with the broader statistical area showing a 5.3% growth over the last five years. The predominant age group is 55-64 years, and the median age sits at 50. Households are most often couples with children, and those with a mortgage repay a median of $1,733 a month. Around 69.3% of homes are owner-occupied, with the largest single tenure being owned outright at 35.6%. Most dwellings are separate houses, making up 65.4% of the suburb's housing stock. The suburb has 5 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

2,749

Suburb · Census 2021

5-Year Growth

+5.3%

3yr: +4.6% · 10yr: +5.7%

SA2 · 5yr

Household Income

$1,718/wk

Suburb · Census 2021 median

Median Age

Suburb · Census 2021

Socio-Economic Index

5/10

SA2 · middle-range

Unemployment

3.2%

SA4 · Q4 2025

Hospitals

Not available

No data for this suburb

Childcare services

1 long day, 1 OSHC

Parks & green space

Parks, reserves

Transport stops

GTFS stops

Dwelling approvals

113

Port Adelaide Enfield · Feb 2026

Median Weekly Rent

$510/wk-7.3% YoY2025 Q4

All dwellings

Based on rental bond lodgements recorded by the state government.

Median House Sale Price

$1,472,500+24.3% YoY2026 Q1

House only

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)

Safety & Crime

2025 Q4

per 1,000 residents

↓ 48%

vs prior year

Theft

24 offences

Reported incidents from SA police. Offence rates may not reflect all crime.

Population over time — Largs Bay - Semaphore (SA2)

ABS publishes annual estimates only at SA2; Semaphore suburb alone is ~2,749 (Census 2021).

Growth at a Glance

3yr: +4.6%5yr: +5.3%10yr: +5.7%Total: +12.8%

Population grew from 13,971 to 15,765 over 24 years, averaging 0.5% per year.

Government school catchment

Intake zone

Primary

Largs Bay School

Secondary

Le Fevre High School

Source: SA Department for Education — School Zones (primary + high). Boundaries can be amended without notice; confirm with the school before relying on enrolment.

Profile

Census snapshot

ABS · 2021

Housing

Public housing 2.9%

Predominantly detached houses (65.4%), mixed tenure (69% own or mortgage), built for families (44% are 3 bed).

Dwelling mix

Houses 65%

Townhouses 23%

744 houses261 townhouses132 apartments

Tenure

Owned 36%

Mortgage 34%

Renting 31%

Number of bedrooms

1 bed

51 (4.5%)

2 bed

330 (29.1%)

3 bed

503 (44.3%)

4 bed

207 (18.2%)

5 bed

38 (3.3%)

6+ bed

6 (0.5%)

Bushfire & flood risk

Bushfire

Not available

Hazard data is not yet available for this state.

Flood

26.1%of suburb area

1% AEP flood extent

Source: SA DEW Flood Mapping

As of May 2026

Overlap is the percentage of the suburb's land area inside the mapped hazard polygons. Always verify the exact property address with the relevant authority before making decisions.

Planning zones

5 zones in suburb

Code	Zone	% covered	Area
ESTABLISHED_NEIGHBOURHOOD	Established NeighbourhoodResidential	65.4%	0.69 km²
OPEN_SPACE	Open SpaceRecreation	14.4%	0.15 km²
SUBURBAN_ACTIVITY_CENTRE	Suburban Activity CentreBusiness	11.6%	0.12 km²
GENERAL_NEIGHBOURHOOD	General NeighbourhoodResidential	8.2%	0.09 km²
LOCAL_ACTIVITY_CENTRE	Local Activity CentreBusiness	0.4%	4,371 m²

Source: SA Planning and Design Code Zones (ZONE_SA/2026-04-30/7965b1556505eb71) · As of Apr 2026. Zone boundaries are amended periodically; verify the exact property with the relevant council before relying on permitted use.