Suburb profile · ABS Census 2021
Williamstown suburb profile
Williamstown, SA · Postcode 5351
This Williamstown suburb profile summarises official Australian Bureau of Statistics Census 2021 data for Williamstown, SA (postcode 5351). 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 Williamstown with nearby suburbs.
Williamstown at a glance
Population
2,981
Median rent
$300/wk
Household income
$1,782/wk
Median age
42
Williamstown 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
+12.7% over 10 years
Population
2,981
was 2,755 in 2016
+226 · +8.2%
Median rent
$300/wk
was $280/wk in 2016
+$20 · +7.1%
Household income
$1,782/wk
was $1,480/wk in 2016
+$302 · +20.4%
Median age
42
was 40 in 2016
+2 · +5%
Dig deeper: Williamstown population growth · Williamstown then and now
Williamstown vs nearby & SA
Median Census 2021 figures for Williamstown, nearby suburbs (8), and the SA state median (suburbs with 1,000+ people).
Rent
-6.2% vs area
- Williamstown$300/wk
- Nearby$295/wk
- SA$320/wk
Household income
+14.3% vs area
- Williamstown$1,782/wk
- Nearby$1,541/wk
- SA$1,559/wk
Median age
+2.4% vs area
- Williamstown42
- Nearby44.5
- SA41
Personal income
+4.1% vs area
- Williamstown$813/wk
- Nearby$753.5/wk
- SA$781/wk
Nearby uses the same postcode first, then larger suburbs in SA.
Socio-economic profile
How Williamstown compares to other Australian suburbs on income, education and occupation — from official ABS SEIFA 2021 data.
Williamstown sits around the national middle for socio-economic advantage.
Relative disadvantage (IRSD)
Decile 71,031.3
Lower score / decile = more relative disadvantage
Advantage & disadvantage (IRSAD)
Decile 6989.1
Higher score / decile = more relative advantage
Economic resources (IER)
Decile 81,059
Access to economic resources (income, housing)
Education & occupation (IEO)
Decile 5960.9
Education and occupational skill levels
Source: ABS SEIFA 2021. See methodology.
Williamstown on the map
OpenStreetMap outline for Williamstown, SA.
Map data © OpenStreetMap contributors. Boundary matching is approximate.
Williamstown people
- Population
- 2,981
- Median age
- 42
- Born overseas
- 14.6%
- Average household size
- 2.7
Total usual residents (Census 2021)
Median age of residents in years
Percentage born outside Australia
Average number of people per household
Williamstown income
- Median household income
- $1,782/wk
- Median personal income
- $813/wk
Median total weekly household income
Median total weekly personal income
Williamstown housing
- Median rent
- $300/wk
- Median mortgage repayment
- $1,500/mo
- Separate houses
- 93.9%
- Flats & apartments
- 0%
- Owned outright
- 30.6%
- Mortgaged
- 50.6%
- Rented
- 10.5%
- Unoccupied dwellings
- 5.3%
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
Williamstown work
- Employment to population
- 65.2%
- Unemployment rate
- 3.3%
- Year 12 or above
- 48.6%
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 5351)
Compare Williamstown with nearby suburbs
Williamstown in numbers
Williamstown had 2,981 residents at the 2021 Census, making it the 205th most populous suburb or locality in SA out of 1,624. The median age is 42, close to the typical SA suburb. The average household has 2.7 people. 14.6% of residents were born overseas.
Among occupied homes, 30.6% own their home outright, 50.6% are paying a mortgage, 10.5% rent. Separate houses make up 93.9% of dwellings, with 0% in flats or apartments. Median rent was $300/wk, 3% below the typical SA suburb.
Median household income was $1,782/wk, 17% above the typical SA suburb. The unemployment rate on Census night was 3.3%. 48.6% 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 8.2% (from 2,755 to 2,981). Median rent moved from $280/wk to $300/wk (+7.1%).
Williamstown suburb FAQs
- What is the median rent in Williamstown, SA?
- The median weekly rent in Williamstown was $300/wk at the 2021 Census (ABS).
- How many people live in Williamstown, SA?
- Williamstown had 2,981 residents at the 2021 Census, up 8.2% from 2016.
- What is the median household income in Williamstown?
- Median household income in Williamstown was $1,782/wk at the 2021 Census.
- Do most people rent or own in Williamstown?
- 10.5% of occupied homes in Williamstown were rented, 30.6% were owned outright and 50.6% were owned with a mortgage.
About this Williamstown suburb profile
Figures are from the ABS Census of Population and Housing 2021 (General Community Profile) for the Suburbs and Localities boundary matching Williamstown (SA). 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