Williamstown at a glance
Walk score
2
Very car dependent
Population
2,981
Median age 42
The brief
What to know about Williamstown.
The postcode for Williamstown is 5351 (SA).
Williamstown (5351) sits in the Adelaide Hills region of South Australia.
Williamstown has roughly 2,981 residents, with a typical family-age mix. Households are predominantly owner-occupied. Daily life is car-dependent: most residents drive to work, school and the shops.
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Day to day
What it’s like to live here.
Williamstown scores 2/100 on walkability, which makes it car-dependent with limited public transport. Plan for two cars in a typical household, especially if work isn't local.
Summer days here average around 28°C (warm), winter mornings around 7°C (cool). Annual rainfall lands at about 448mm. Data comes from the Bureau of Meteorology's Adelaide (Kent Town) station, 11.1km away.
Schooling within or near the suburb covers 10 government primary, 1 Catholic, 8 independent.
Who lives here
Demographics.
The 2021 Census put Williamstown's population at 2,981, with a median age of 42. That sits as a typical family-age mix. Households are predominantly owner-occupied (86% own, 11% rent), which shapes everything from school catchment stability to how often properties turn over. The household mix skews family-dominated (80% family households, 20% lone person), so amenity decisions tend to follow what families want: parks, schools, supermarkets.
Population
2,981
Median age
42
Family households
80%
Lone person
20%
Demographics data as of May 2026· ABS 2021 Census
Market
The price of a home here.
Median house price
Verified median pending
We don't yet have a verified suburb-level median for this market. We're working on a data partner; in the meantime, treat the state-level figures as a guide only. How we source data.
Rental and ownership
Weekly rent (house)
$650/wk
Weekly rent (unit)
$250/wk
Owner occupied
86%
Renter occupied
11%
At a deeper level
2,981
Median age: 42
Rental data as of March 2026· rental-sa
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Safety
Crime and safety.
33
total offences in 2025-26
Top offence categories
Crime statistics are reported at LGA level and may cover a broader area than this suburb.
Source: State Police Open Data
Crime data as of June 2026· State Police Open Data
Getting around
Walkability.
2
0
0
Scores calculated from OpenStreetMap data (ODbL)
Walkability data as of May 2026· OpenStreetMap
Place
Location.
Amenities
Transport
Education
Schools in Williamstown.
Local schools for Williamstown
View the catchment for each school to find out more.
Government School Catchment
Williamstown Primary School
Lyndoch Primary School
Sandy Creek Primary School
© ACARA, licensed under CC BY 4.0.
Climate
Weather year-round.
Annual Rainfall
448 mm
Hottest Month (avg max)
28.0°C
Coldest Month (avg min)
7.0°C
Monthly Rainfall (mm)
Weather data from BOM station Adelaide (Kent Town) (11 km away)
Climate data as of May 2026· Bureau of Meteorology
Frequently asked
About Williamstown.
- What is the Williamstown postcode?
- Williamstown is in the 5351 postcode, in SA, in the Adelaide Hills Council region.
- Where is Williamstown?
- Williamstown is a regional suburb in SA, postcode 5351, in the Adelaide Hills Council region.
- What is the average rent in Williamstown?
- The median weekly rent for houses is $650, for units it's $250.
- What schools are in Williamstown?
- There are 20 schools serving Williamstown on this page, including Williamstown Primary School, St Jakobi Lutheran School, Lyndoch Primary School.
- How walkable is Williamstown?
- Williamstown has a Walk Score of 2 out of 100, highly car-dependent. transit score 0, bike score 0.
- What suburbs are near Williamstown?
- Williamstown is close to Barossa Goldfields, Cockatoo Valley, Lyndoch, Altona, Pewsey Vale.
- What is the population of Williamstown?
- The population of Williamstown is approximately 2,981 (2021 Census). The median age is 42.
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Surrounding Suburbs
Side by side
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Sources cited
Median, growth and rental data from state revenue offices and ABS. Census from ABS 2021. Climate from BoM. Hazard from Geoscience Australia. School data from ACARA. Crime from state police open data. Full methodology →
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