South Australia · Suburb Profile
Semaphore South SA — Suburb Profile
Population, median income, rent prices, housing costs and demographics for Semaphore South, South Australia. ABS Census 2021.
The population of Semaphore South SA is 1,031 according to the 2021 Census. The median personal income in Semaphore South is $930 per week ($48,360 per year). Median rent in Semaphore South is $320 per week ($1,387 per month). Semaphore South has a median age of 44 years, older than the national median of 38. Semaphore South has a population density of 1653.0 people per km².
The most common overseas birthplace in Semaphore South is England. The most common religion is No Religion (51% of residents). After English, the most spoken language is Greek. The median monthly mortgage repayment in Semaphore South is $1,842.
There were 16 recorded offences in Semaphore South in 2025-26, a rate of 16 offences per 1,000 people. The most common offence category was theft (6 offences).
Semaphore South Map
Semaphore South Population
Semaphore South Median Income & Rent
Semaphore South Demographics
Gender Split
Population Density
Households
Semaphore South Age Distribution
Source: ABS Census 2021 — Suburb & Locality (SAL)
Semaphore South Housing Tenure
Source: ABS Census 2021 — Suburb & Locality (SAL)
Semaphore South Country of Birth
Source: ABS Census 2021 G09 — Country of Birth by SAL
Semaphore South Religion
Source: ABS Census 2021 G14 — Religion by SAL
Semaphore South Education Level
Source: ABS Census 2021 G16 — Highest Year of School by SAL
Semaphore South Languages Spoken at Home
Source: ABS Census 2021 G13 — Language Spoken at Home by SAL
Semaphore South Employment
Source: ABS Census 2021 G46 — Labour Force Status by SAL
Semaphore South Qualifications
Source: ABS Census 2021 G49 — Non-School Qualification by SAL
Semaphore South Occupation
Source: ABS Census 2021 G51 — Industry of Employment by Occupation
Semaphore South Field of Study
Source: ABS Census 2021 G51 — Field of Study by SAL
Semaphore South Dwelling Types
Source: ABS Census 2021 G36 — Dwelling Structure by SAL
Semaphore South Weekly Household Income
Source: ABS Census 2021 G33 — Household Income by SAL
Semaphore South Marital Status
Source: ABS Census 2021 G05 — Marital Status by SAL
Semaphore South Ancestry
Source: ABS Census 2021 G08 — Ancestry by SAL
Semaphore South School & University Attendance
Source: ABS Census 2021 G15 — Type of Educational Institution by SAL
Semaphore South Need for Assistance
Source: ABS Census 2021 G18 — Core Activity Need for Assistance by SAL
Semaphore South Volunteering
Source: ABS Census 2021 G23 — Voluntary Work by SAL
Semaphore South Monthly Mortgage Repayments
Source: ABS Census 2021 G38 — Mortgage Repayment by SAL
Semaphore South How People Get to Work
Source: ABS Census 2021 G62 — Method of Travel to Work by SAL
Semaphore South Car Ownership
Source: ABS Census 2021 G34 — Motor Vehicles per Dwelling by SAL
Semaphore South Number of Bedrooms
Source: ABS Census 2021 G41 — Number of Bedrooms by SAL
Semaphore South Population Mobility
Source: ABS Census 2021 G43 — Summary by SAL
Semaphore South Indigenous Population
Source: ABS Census 2021 G07 — Indigenous Status by SAL
Semaphore South Long-term Health Conditions
Source: ABS Census 2021 G19 — Long-term Health Conditions by SAL
Semaphore South Personal Weekly Income Distribution
Source: ABS Census 2021 G17 — Personal Income by SAL
Semaphore South Family Structure
Source: ABS Census 2021 G29 — Family Composition by SAL
Semaphore South Military Service
Source: ABS Census 2021 G22 — ADF Service by SAL
Semaphore South Unpaid Carers
Source: ABS Census 2021 G25 — Unpaid Assistance by SAL
Semaphore South Children Ever Born
Source: ABS Census 2021 G28 — Children Ever Born by SAL
Semaphore South When Migrants Arrived
Source: ABS Census 2021 G10 — Year of Arrival by SAL
Semaphore South Unpaid Domestic Work
Source: ABS Census 2021 G24 — Unpaid Domestic Work by SAL
Semaphore South Household Size
Source: ABS Census 2021 G35 — Household Size by SAL
Semaphore South Where Residents Moved From
Source: ABS Census 2021 G44 — Address 1 Year Ago by SAL
Semaphore South Family Blending
Source: ABS Census 2021 G31 — Family Blending by SAL
Semaphore South Crime Statistics
Reported offences in 2025-26 — 16 total
Offence trend by year:
Source: SA Government Open Data — data.sa.gov.au
Semaphore South Schools
Source: ACARA — Australian Curriculum, Assessment and Reporting Authority, 2025. ICSEA = Index of Community Socio-Educational Advantage (national average 1000).
View all schools in Semaphore South with map →Semaphore South Rent Prices & Affordability
Rent is under 25% of household income — generally considered affordable.
If you earn X in Semaphore South
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Semaphore South vs State & National Average
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Frequently Asked Questions About Semaphore South
What is the population of Semaphore South SA?
The population of Semaphore South SA is 1,031 according to the ABS Census 2021.The suburb has a population density of 1653.0 people per km².Semaphore South is ranked #3,926 out of 14,663 suburbs by population.
What is the median income in Semaphore South?
The median personal income in Semaphore South SA is $930 per week, or $48,360 per year.The median household income is $1,676 per week.Family income is $2,352 per week.Semaphore South is ranked #1,807 by income out of 14,663 Australian suburbs.
How much is rent in Semaphore South?
Median rent in Semaphore South SA is $320 per week ($1,387 per month).Rent represents 19.1% of household income, which is considered affordable.Semaphore South ranks #4,051 out of 14,663 suburbs by rent.
What are mortgage repayments in Semaphore South?
The median monthly mortgage repayment in Semaphore South SA is $1,842. This data comes from the ABS Census 2021 and reflects mortgage repayments for owner-occupied dwellings.
What is the median age in Semaphore South?
The median age in Semaphore South SA is 44 years.This is older than the national median age of 38 years.
Is Semaphore South a good suburb to live in?
Semaphore South is a suburb in South Australia with a population of 1,031.The median income is $930/wk, which is above the SA average of $763/wk.Rent affordability is rated as affordable (19.1% of household income). See the full suburb profile above for detailed statistics.
Data: Australian Bureau of Statistics, Census of Population and Housing 2021. SA2 area: 41331. All dollar figures in AUD.