South Australia · Suburb Profile

Semaphore SA — Suburb Profile

Population, median income, rent prices, housing costs and demographics for Semaphore, South Australia. ABS Census 2021.

The population of Semaphore SA is 2,749 according to the 2021 Census. The median personal income in Semaphore is $857 per week ($44,564 per year). Median rent in Semaphore is $320 per week ($1,387 per month). Semaphore has a median age of 50 years, older than the national median of 38. Semaphore has a population density of 2592.9 people per km².

The most common overseas birthplace in Semaphore is England. The most common religion is No Religion (57% of residents). After English, the most spoken language is Other. The median monthly mortgage repayment in Semaphore is $1,733.

There were 86 recorded offences in Semaphore in 2025-26, a rate of 31 offences per 1,000 people. The most common offence category was theft (39 offences).

Semaphore Map

📍

Loading map…

Semaphore Population

residents (Census 2021)

Semaphore Median Income & Rent

💰

Median Income

$857/wk

$44,564 per year

#2666 of 14,663

🏠

Median Rent

$320/wk

$1,387 per month

#4051 of 14,663

👤

Median Age

50years

12 years older than national median

🏡

Mortgage

$1,733/mo

Avg household size: 2.2 · 0.8 per bedroom

Semaphore Demographics

Gender Split

Male 48.7% (1,341) Female 51.3% (1,410)

Population Density

2592.9

people per km²

2,749 people · 1.1 km²

Households

2.2

Avg household size

0.8

Persons per bedroom

$2,362

Family income/wk

Semaphore Age Distribution

0-4

5-9

10-14

15-19

20-24

25-29

30-34

35-39

40-44

45-49

50-54

55-59

60-64

65-69

70-74

75-79

80-84

85+

♂ Male ♀ Female

Source: ABS Census 2021 — Suburb & Locality (SAL)

Semaphore Housing Tenure

🏠

Owned outright

51.4% 400 dwellings

🏦

Owned with mortgage

48.6% 378 dwellings

Source: ABS Census 2021 — Suburb & Locality (SAL)

Semaphore Country of Birth

Australia

87.1%

England

9.5%

Germany

1.1%

Croatia

0.6%

Brazil

0.4%

France

0.4%

Fiji

0.4%

China

0.3%

Iran

0.3%

Source: ABS Census 2021 G09 — Country of Birth by SAL

Semaphore Religion

No Religion

57.4%

Catholic

20.3%

Not stated

7.2%

Anglican

6.9%

Uniting Church

2.8%

Lutheran

2.0%

Eastern Orthodox

1.9%

Christian (other)

1.5%

Source: ABS Census 2021 G14 — Religion by SAL

Semaphore Education Level

Year 12 or equivalent

65.2%

Year 11 or equivalent

18.2%

Year 10 or equivalent

13.6%

Year 9 or equivalent

3.0%

Source: ABS Census 2021 G16 — Highest Year of School by SAL

Semaphore Languages Spoken at Home

Other

28.9%

Greek

17.1%

Italian

15.8%

Arabic

9.2%

Spanish

9.2%

Mandarin

6.6%

French

6.6%

Vietnamese

6.6%

Source: ABS Census 2021 G13 — Language Spoken at Home by SAL

Semaphore Employment

💼

Employed full-time

39.0% 865 people

⏰

Employed part-time

23.5% 521 people

🔍

Unemployed

2.6% 57 people

🏠

Not in labour force

35.0% 776 people

Source: ABS Census 2021 G46 — Labour Force Status by SAL

Semaphore Qualifications

Bachelor Degree

31.1%

Certificate III/IV

29.6%

Advanced Diploma/Diploma

17.7%

Postgraduate Degree

13.1%

Graduate Diploma/Certificate

6.3%

Certificate I/II

2.2%

Source: ABS Census 2021 G49 — Non-School Qualification by SAL

Semaphore Occupation

Professionals

34.5%

Managers

19.9%

Community & Personal Service

12.9%

Technicians & Trade Workers

11.1%

Clerical & Administrative

9.3%

Sales Workers

5.2%

Labourers

4.0%

Machinery Operators & Drivers

3.1%

Source: ABS Census 2021 G51 — Industry of Employment by Occupation

Semaphore Field of Study

Management & Commerce

21.3%

Society & Culture

17.7%

Health

16.2%

Engineering

15.4%

Education

8.5%

Architecture & Building

5.6%

Creative Arts

4.5%

Natural & Physical Sciences

4.0%

Food, Hospitality & Personal Services

3.9%

Information Technology

1.6%

Agriculture & Environment

1.3%

Source: ABS Census 2021 G51 — Field of Study by SAL

Semaphore Dwelling Types

Separate house

74.0%

Semi-detached (1 storey)

18.3%

Semi-detached (2+ storey)

7.8%

Source: ABS Census 2021 G36 — Dwelling Structure by SAL

Semaphore Weekly Household Income

Nil/Negative/wk

1.4%

$1-$149/wk

0.6%

$150-$299/wk

1.0%

$300-$399/wk

3.1%

$400-$499/wk

7.9%

$500-$649/wk

5.1%

$650-$799/wk

5.9%

$800-$999/wk

5.8%

$1,000-$1,249/wk

7.7%

$1,250-$1,499/wk

6.0%

$1,500-$1,749/wk

6.0%

$1,750-$1,999/wk

5.7%

$2,000-$2,499/wk

11.3%

$2,500-$2,999/wk

8.0%

$3,000-$3,499/wk

5.6%

$3,500-$3,999/wk

4.2%

$4,000+/wk

14.8%

Source: ABS Census 2021 G33 — Household Income by SAL

Semaphore Marital Status

💍

Married

41.3% 1,005

↔️

Separated

3.7% 91

📋

Divorced

11.8% 287

🕊️

Widowed

4.4% 106

👤

Never married

38.8% 943

Source: ABS Census 2021 G05 — Marital Status by SAL

Semaphore Ancestry

English

32.7%

Australian

23.2%

Irish

9.7%

Scottish

9.6%

German

6.4%

Other

5.8%

Italian

5.3%

Dutch

2.1%

Greek

1.6%

Aboriginal Australianralian

1.5%

Polish

1.3%

Croatian

0.8%

Source: ABS Census 2021 G08 — Ancestry by SAL

Semaphore School & University Attendance

Primary — Government

21.0%

Primary — Catholic

21.0%

Secondary — Catholic

17.1%

Vocational Education

13.7%

Secondary — Government

10.6%

Pre-school

7.0%

Secondary — Other Non-Govt

6.4%

Primary — Other Non-Govt

3.1%

Source: ABS Census 2021 G15 — Type of Educational Institution by SAL

Semaphore Need for Assistance

♿

Needs assistance

7.6% 392

✅

No need for assistance

92.4% 4,794

Source: ABS Census 2021 G18 — Core Activity Need for Assistance by SAL

Semaphore Volunteering

🤝

Volunteer

20.5% 467

—

Not a volunteer

79.5% 1,816

Source: ABS Census 2021 G23 — Voluntary Work by SAL

Semaphore Monthly Mortgage Repayments

$0-$299/mo

11.3%

$300-$449/mo

1.7%

$450-$599/mo

1.2%

$600-$799/mo

4.9%

$800-$999/mo

6.1%

$1,000-$1,399/mo

13.1%

$1,400-$1,799/mo

16.9%

$1,800-$2,399/mo

21.2%

$2,400-$2,999/mo

13.4%

$3,000-$3,999/mo

10.2%

Source: ABS Census 2021 G38 — Mortgage Repayment by SAL

Semaphore How People Get to Work

Car (driver)

72.0%

Did not go to work

13.2%

Car (passenger)

4.1%

Train

3.6%

Walked only

2.8%

Bicycle

1.9%

Motorbike/Scooter

0.8%

Taxi/Rideshare

0.4%

Truck

0.4%

Other

0.3%

Bus

0.3%

Tram/Light Rail

0.2%

Source: ABS Census 2021 G62 — Method of Travel to Work by SAL

Semaphore Car Ownership

0 vehicles

8.2%

1 vehicle

40.2%

2 vehicles

36.7%

3 vehicles

9.3%

4+ vehicles

5.7%

Source: ABS Census 2021 G34 — Motor Vehicles per Dwelling by SAL

Semaphore Number of Bedrooms

1 bedroom

4.5%

2 bedrooms

29.1%

3 bedrooms

44.3%

4 bedrooms

18.2%

5 bedrooms

3.3%

6+ bedrooms

0.5%

Source: ABS Census 2021 G41 — Number of Bedrooms by SAL

Semaphore Population Mobility

14.2%

moved in the last year

38.0%

moved in the last 5 years

4.2%

unemployment rate (Census)

62.2%

labour force participation

Source: ABS Census 2021 G43 — Summary by SAL

Semaphore Indigenous Population

2.0%

Aboriginal & Torres Strait Islander

106

Indigenous residents

5,114

Non-Indigenous residents

Source: ABS Census 2021 G07 — Indigenous Status by SAL

Semaphore Long-term Health Conditions

Mental health

323

Asthma

130

Arthritis

Heart disease

Diabetes

Lung condition

Cancer

Stroke

Kidney disease

Dementia

Source: ABS Census 2021 G19 — Long-term Health Conditions by SAL

Semaphore Personal Weekly Income Distribution

$0 or less/wk

8.4%

$1-$149/wk

3.9%

$150-$299/wk

6.0%

$300-$399/wk

3.6%

$400-$499/wk

5.3%

$500-$649/wk

4.2%

$650-$799/wk

8.4%

$800-$999/wk

8.8%

$1,000-$1,249/wk

9.8%

$1,250-$1,499/wk

8.4%

$1,500-$1,749/wk

7.7%

$1,750-$1,999/wk

7.7%

$2,000-$2,999/wk

11.6%

$3,000-$3,499/wk

2.2%

$3,500+/wk

4.0%

Source: ABS Census 2021 G17 — Personal Income by SAL

Semaphore Family Structure

Couple — no children

35.3%

Couple — children under 15

31.0%

Couple — no children under 15

19.5%

One parent — no children under 15

8.4%

One parent — children under 15

5.8%

Source: ABS Census 2021 G29 — Family Composition by SAL

Semaphore Military Service

🎖️

Current ADF — Regular

0.8% 18

🛡️

Current ADF — Reserves

0.2% 4

🏅

Previously served

2.7% 62

👤

Never served

96.3% 2,205

Source: ABS Census 2021 G22 — ADF Service by SAL

Semaphore Unpaid Carers

🤲

Provided unpaid assistance

15.4% 351

—

Did not provide

84.6% 1,927

Source: ABS Census 2021 G25 — Unpaid Assistance by SAL

Semaphore Children Ever Born

No children

41.7%

1 child

13.9%

2 children

28.8%

3 children

11.0%

4 children

3.3%

5+ children

1.3%

Source: ABS Census 2021 G28 — Children Ever Born by SAL

Semaphore When Migrants Arrived

Before 1951

1951–1960

1961–1970

124

1971–1980

1981–1990

1991–2000

2001–2010

2011–2015

2016

2017

2018

2019

2020

2021

Source: ABS Census 2021 G10 — Year of Arrival by SAL

Semaphore Unpaid Domestic Work

Less than 5 hours

23.0%

5–14 hours

36.0%

15–29 hours

13.0%

30+ hours

6.8%

Did not do domestic work

21.3%

Source: ABS Census 2021 G24 — Unpaid Domestic Work by SAL

Semaphore Household Size

1 person

31.7%

2 persons

39.2%

3 persons

14.1%

4 persons

10.5%

5 persons

3.5%

6+ persons

1.0%

Source: ABS Census 2021 G35 — Household Size by SAL

Semaphore Where Residents Moved From

Same address

2,202

Moved from SA

212

Moved — same area (SA2)

Moved from VIC

Moved from overseas

Moved from NSW

Moved from QLD

Moved from WA

Moved from ACT

Moved from NT

Source: ABS Census 2021 G44 — Address 1 Year Ago by SAL

Semaphore Family Blending

Intact family — no other children

93.1%

Step family — no other children

5.4%

Blended family — no other children

1.5%

Source: ABS Census 2021 G31 — Family Blending by SAL

Semaphore Crime Statistics

Reported offences in 2025-26 — 86 total

Theft

Assault

Property Damage

Fraud

Break & Enter

Other Against Person

Offence trend by year:

2021

2022

2023

2024

2025

Source: SA Government Open Data — data.sa.gov.au

Semaphore Schools

schools nearby

government

1009

avg ICSEA score

3,199

total students

Portside Christian College Independent

Combined · R-12 · 626 students

1067

ICSEA

West Lakes Shore School Government

Primary · R-6 · 554 students

1060

ICSEA

Dominican School Catholic

Primary · R-6 · 230 students

1048

ICSEA

Westport Primary School Government

Primary · R-6 · 421 students

1025

ICSEA

Largs Bay School Government

Primary · R-6 · 418 students

1018

ICSEA

Alberton Primary School Government

Primary · R-6 · 262 students

1002

ICSEA

Le Fevre High School Government

Secondary · U, 7-12 · 456 students

951

ICSEA

Le Fevre Peninsula Primary School Government

Primary · U, R-6 · 232 students

902

ICSEA

Indie School Port Adelaide Campus Independent

Secondary

Source: ACARA — Australian Curriculum, Assessment and Reporting Authority, 2025. ICSEA = Index of Community Socio-Educational Advantage (national average 1000).

View all schools in Semaphore with map →

Semaphore Rent Prices & Affordability

19%

of income

Affordable

Household Income $1,718/wk

Median Rent $320/wk

Rent-to-Income 18.6%

Rent is under 25% of household income — generally considered affordable.

If you earn X in Semaphore

Your weekly income

≈ $7,445/month

Median rent $320/wk

Left after rent $1,398/wk

Rent share 18.6%

Cheaper alternatives with similar incomes

Jamestown

Income: $730/wk Rent: $215/wk Save: $105/wk

Middleton (SA)

Income: $708/wk Rent: $283/wk Save: $37/wk

Mount Pleasant (SA)

Income: $687/wk Rent: $250/wk Save: $70/wk

Tanunda

Income: $777/wk Rent: $300/wk Save: $20/wk

Joslin

Income: $943/wk Rent: $310/wk Save: $10/wk

Exeter (SA)

Income: $849/wk Rent: $310/wk Save: $10/wk

Penola

Income: $804/wk Rent: $198/wk Save: $122/wk

Monash (SA)

Income: $755/wk Rent: $230/wk Save: $90/wk

Semaphore vs State & National Average

Nearby Suburbs in SA

Rose Park

Pop: 1,375 Income: $1,132/wk Rent: $365/wk

Birdwood (SA)

Pop: 1,376 Income: $776/wk Rent: $320/wk

Evandale (SA)

Pop: 1,378 Income: $896/wk Rent: $320/wk

Unley Park

Pop: 1,383 Income: $1,346/wk Rent: $350/wk

Manningham

Pop: 1,391 Income: $877/wk Rent: $320/wk

Forestville (SA)

Pop: 1,400 Income: $1,042/wk Rent: $340/wk

Compare Semaphore

Semaphore vs Rose Park →Semaphore vs Birdwood (SA) →Semaphore vs Evandale (SA) →Semaphore vs Unley Park →

Frequently Asked Questions About Semaphore

What is the population of Semaphore SA?

The population of Semaphore SA is 2,749 according to the ABS Census 2021.The suburb has a population density of 2592.9 people per km².Semaphore is ranked #2,557 out of 14,663 suburbs by population.

What is the median income in Semaphore?

The median personal income in Semaphore SA is $857 per week, or $44,564 per year.The median household income is $1,718 per week.Family income is $2,362 per week.Semaphore is ranked #2,666 by income out of 14,663 Australian suburbs.

How much is rent in Semaphore?

Median rent in Semaphore SA is $320 per week ($1,387 per month).Rent represents 18.6% of household income, which is considered affordable.Semaphore ranks #4,051 out of 14,663 suburbs by rent.

What are mortgage repayments in Semaphore?

The median monthly mortgage repayment in Semaphore SA is $1,733. This data comes from the ABS Census 2021 and reflects mortgage repayments for owner-occupied dwellings.

What is the median age in Semaphore?

The median age in Semaphore SA is 50 years.This is older than the national median age of 38 years.

Is Semaphore a good suburb to live in?

Semaphore is a suburb in South Australia with a population of 2,749.The median income is $857/wk, which is above the SA average of $763/wk.Rent affordability is rated as affordable (18.6% of household income). See the full suburb profile above for detailed statistics.

Explore More

📊 Australian Average Salary 🏘️ Australian House Prices 🌆 Adelaide Cost of Living

Looking for schools, childcare centres, and playgrounds in this area? See kid.com.au for family facilities data.

Data: Australian Bureau of Statistics, Census of Population and Housing 2021. SA2 area: 41329. All dollar figures in AUD.