Suburb profile · ABS Census 2021
Semaphore South suburb profile
Semaphore South, SA · Postcode 5019
This Semaphore South suburb profile summarises official Australian Bureau of Statistics Census 2021 data for Semaphore South, SA (postcode 5019). Use it as a free suburb report covering population, median rent, household income, age, housing tenure and employment, plus how those figures changed since Census 2016— then compare Semaphore South with nearby suburbs.
Semaphore South at a glance
Population
1,031
Median rent
$320/wk
Household income
$1,676/wk
Median age
44
Semaphore South trends (2016 → 2021)
Change since the previous Census. Historical figures are mapped from State Suburbs (SSC) to today's suburb boundaries.
Population
Census 2011 → 2016 → 2021
+4.8% over 10 years
Population
1,031
was 1,019 in 2016
+12 · +1.2%
Median rent
$320/wk
was $300/wk in 2016
+$20 · +6.7%
Household income
$1,676/wk
was $1,378/wk in 2016
+$298 · +21.6%
Median age
44
was 43 in 2016
+1 · +2.3%
Dig deeper: Semaphore South population growth · Semaphore South then and now
Semaphore South vs nearby & Greater Adelaide
Median Census 2021 figures for Semaphore South, nearby suburbs (8), and the Adelaide metro median (suburbs with 1,000+ people).
Rent
-1.8% vs area
- Semaphore South$320/wk
- Nearby$315/wk
- Adelaide$326/wk
Household income
+4.3% vs area
- Semaphore South$1,676/wk
- Nearby$1,472.5/wk
- Adelaide$1,607/wk
Median age
+10% vs area
- Semaphore South44
- Nearby48
- Adelaide40
Personal income
+16.4% vs area
- Semaphore South$930/wk
- Nearby$774.5/wk
- Adelaide$799/wk
Nearby uses the same postcode first, then larger suburbs in SA. See Adelaide rankings.
Socio-economic profile
How Semaphore South compares to other Australian suburbs on income, education and occupation — from official ABS SEIFA 2021 data.
Semaphore South sits above average for socio-economic advantage compared with suburbs Australia-wide.
Relative disadvantage (IRSD)
Decile 71,046.5
Lower score / decile = more relative disadvantage
Advantage & disadvantage (IRSAD)
Decile 81,029
Higher score / decile = more relative advantage
Economic resources (IER)
Decile 4998.9
Access to economic resources (income, housing)
Education & occupation (IEO)
Decile 81,028.8
Education and occupational skill levels
Source: ABS SEIFA 2021. See methodology.
Semaphore South on the map
OpenStreetMap outline for Semaphore South, SA.
Map data © OpenStreetMap contributors. Boundary matching is approximate.
Semaphore South people
- Population
- 1,031
- Median age
- 44
- Born overseas
- 19.7%
- Average household size
- 2.2
Total usual residents (Census 2021)
Median age of residents in years
Percentage born outside Australia
Average number of people per household
Semaphore South income
- Median household income
- $1,676/wk
- Median personal income
- $930/wk
Median total weekly household income
Median total weekly personal income
Semaphore South housing
- Median rent
- $320/wk
- Median mortgage repayment
- $1,842/mo
- Separate houses
- 53.1%
- Flats & apartments
- 6.1%
- Owned outright
- 29.8%
- Mortgaged
- 31.4%
- Rented
- 25.8%
- Unoccupied dwellings
- 10.3%
Median weekly rent for rented dwellings
Median monthly mortgage repayment
Percentage of dwellings that are separate houses
Percentage of dwellings that are flats or apartments
Percentage of dwellings owned without a mortgage
Percentage of dwellings with a mortgage
Percentage of dwellings rented
Percentage of private dwellings unoccupied on Census night
Semaphore South work
- Employment to population
- 63.4%
- Unemployment rate
- 3.8%
- Year 12 or above
- 59.2%
Employed persons as a percentage of population aged 15+
Unemployed persons as a percentage of the labour force
Percentage with Year 12 or equivalent as highest school level
Nearby suburb profiles (near 5019)
Compare Semaphore South with nearby suburbs
Semaphore South in numbers
Semaphore South had 1,031 residents at the 2021 Census, making it the 424th most populous suburb or locality in SA out of 1,624. The median age is 44, 5% above the typical SA suburb. The average household has 2.2 people. 19.7% of residents were born overseas.
Among occupied homes, 29.8% own their home outright, 31.4% are paying a mortgage, 25.8% rent. Separate houses make up 53.1% of dwellings, with 6.1% in flats or apartments. Median rent was $320/wk, 3% above the typical SA suburb.
Median household income was $1,676/wk, 10% above the typical SA suburb. The unemployment rate on Census night was 3.8%. 59.2% of adults had completed Year 12 or above. On the ABS SEIFA index of relative socio-economic disadvantage it sits in decile 7 nationally (1 is most disadvantaged, 10 least).
Between the 2016 and 2021 Censuses the population grew 1.2% (from 1,019 to 1,031). Median rent moved from $300/wk to $320/wk (+6.7%).
Semaphore South suburb FAQs
- What is the median rent in Semaphore South, SA?
- The median weekly rent in Semaphore South was $320/wk at the 2021 Census (ABS).
- How many people live in Semaphore South, SA?
- Semaphore South had 1,031 residents at the 2021 Census, up 1.2% from 2016.
- What is the median household income in Semaphore South?
- Median household income in Semaphore South was $1,676/wk at the 2021 Census.
- Do most people rent or own in Semaphore South?
- 25.8% of occupied homes in Semaphore South were rented, 29.8% were owned outright and 31.4% were owned with a mortgage.
About this Semaphore South suburb profile
Figures are from the ABS Census of Population and Housing 2021 (General Community Profile) for the Suburbs and Localities boundary matching Semaphore South. Where shown, 2016 values come from the 2016 State Suburbs (SSC) profile, linked via ABS geographic correspondence — boundaries are not always identical. Medians may be suppressed for very small areas. This is not financial or relocation advice — use it alongside current market data.
Source: ABS Census 2021. Methodology · Richest suburbs in Adelaide