Williamstown, SA: suburb profile

The population of Williamstown SA is 2,981 according to the 2021 Census. The median personal income in Williamstown is $813 per week ($42,276 per year). Median rent in Williamstown is $300 per week ($1,300 per month). Williamstown has a median age of 42 years, older than the national median of 38. Williamstown has a population density of 42 people per km².

The most common overseas birthplace in Williamstown is England. The most common religion is No religion (57.0% of residents). After English, the most spoken language is German. The median monthly mortgage repayment in Williamstown is $1,500.

There were 25 recorded offences in Williamstown in 2025-26, a rate of 8 offences per 1,000 people. The most common offence category was theft (7 offences).

Source: ABS Census of Population and Housing 2021; offences from SA Government Open Data (data.sa.gov.au), 2025-26.

Williamstown Map

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Williamstown Population

2,981 residents at the 2021 Census.

Williamstown Median Income & Rent

Median Income

$813/wk

$42,276 per year

Ranked 3,378 of 14,663

Median Rent

$300/wk

$1,300 per month

Ranked 4,529 of 14,663

Median Age

42years

4 years older than the national median

Mortgage

$1,500/mo

Avg household size: 2.7 · 0.8 per bedroom

Williamstown Demographics

Gender Split

Male 50.1% (1,493) Female 49.9% (1,489)

Population Density

people per km²

2,981 people · 71.3 km²

Households

2.7

Avg household size

0.8

Persons per bedroom

$2,063

Family income/wk

Williamstown 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 and Locality (SAL)

Williamstown Home Ownership

Of owner-occupied homes in Williamstown, 37.7% are owned outright and 62.3% have a mortgage.

Owned outright

37.7%

Owned with mortgage

62.3%

Rented homes are not included in this breakdown.

Source: ABS Census 2021, Suburb and Locality (SAL)

Most common overseas birthplaces

England
Germany
Canada
France

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

Williamstown Religion

No religion

57.0%

Anglican

9.2%

Catholic

7.5%

Not stated

6.5%

Lutheran

5.8%

Uniting Church

5.8%

Christian (other)

2.7%

Church Christ

1.0%

Source: ABS Census 2021, G14 Religion by SAL

Williamstown Education Level

Year 12 or equivalent

52.7%

Year 11 or equivalent

23.4%

Year 10 or equivalent

18.8%

Year 9 or equivalent

5.1%

Shares are of people whose highest year of school is Year 9 to 12 only. Source: ABS Census 2021, G16 Highest Year of School by SAL

Most common languages at home other than English

German
French
Italian

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

Williamstown Employment

Employed full-time

41.4% 912 people

Employed part-time

24.3% 534 people

Unemployed

2.3% 51 people

Not in labour force

32.0% 705 people

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

Williamstown Qualifications

Certificate III/IV

47.9%

Bachelor Degree

22.0%

Advanced Diploma/Diploma

18.7%

Graduate Diploma/Certificate

4.4%

Postgraduate Degree

3.6%

Certificate I/II

3.5%

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

Williamstown Occupation

Professionals

23.5%

Technicians & Trade Workers

20.4%

Managers

15.1%

Community & Personal Service

13.4%

Clerical & Administrative

11.0%

Labourers

7.0%

Sales Workers

4.7%

Machinery Operators & Drivers

4.7%

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

Williamstown Field of Study

Engineering

22.3%

Management & Commerce

15.8%

Society & Culture

14.6%

Education

11.4%

Health

11.1%

Architecture & Building

8.7%

Food, Hospitality & Personal Services

5.4%

Agriculture & Environment

4.6%

Natural & Physical Sciences

2.7%

Creative Arts

2.4%

Information Technology

0.9%

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

Williamstown Dwelling Types

Separate house

99.1%

Semi-detached (1 storey)

0.9%

Source: ABS Census 2021, G36 Dwelling Structure by SAL

Williamstown Weekly Household Income

Nil/Negative/wk

0.9%

$1-$149/wk

0.5%

$150-$299/wk

0.8%

$300-$399/wk

0.6%

$400-$499/wk

4.7%

$500-$649/wk

4.7%

$650-$799/wk

6.3%

$800-$999/wk

6.5%

$1,000-$1,249/wk

8.9%

$1,250-$1,499/wk

7.5%

$1,500-$1,749/wk

6.4%

$1,750-$1,999/wk

7.1%

$2,000-$2,499/wk

12.9%

$2,500-$2,999/wk

9.6%

$3,000-$3,499/wk

7.4%

$3,500-$3,999/wk

6.0%

$4,000+/wk

9.2%

Source: ABS Census 2021, G33 Household Income by SAL

Williamstown Marital Status

Married

54.8% 1,309

Separated

3.1% 73

Divorced

7.9% 189

Widowed

4.6% 111

Never married

29.6% 706

Source: ABS Census 2021, G05 Marital Status by SAL

Williamstown Ancestry

English

49.0%

Australian

44.6%

German

12.7%

Scottish

9.8%

Irish

7.1%

Italian

2.6%

Dutch

2.5%

Australian Aboriginal

1.1%

Polish

0.8%

Greek

0.6%

New Zealander

0.6%

Shares are of the suburb population. People can report up to two ancestries, so shares add to more than 100%. Source: ABS Census 2021, G08 Ancestry by SAL

Williamstown School & University Attendance

Primary — Government

32.7%

Secondary — Government

17.0%

Primary — Other Non-Govt

16.5%

Vocational Education

9.8%

Secondary — Other Non-Govt

9.7%

Secondary — Catholic

5.7%

Pre-school

5.7%

Primary — Catholic

2.8%

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

Williamstown Need for Assistance

Needs assistance

5.1%

No need for assistance

94.9%

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

Williamstown Volunteering

Volunteer

20.9% 478

Not a volunteer

79.1% 1,813

Source: ABS Census 2021, G23 Voluntary Work by SAL

Williamstown Monthly Mortgage Repayments

$0-$299/mo

3.8%

$300-$449/mo

3.1%

$450-$599/mo

1.6%

$600-$799/mo

4.9%

$800-$999/mo

5.4%

$1,000-$1,399/mo

25.4%

$1,400-$1,799/mo

23.2%

$1,800-$2,399/mo

21.2%

$2,400-$2,999/mo

6.7%

$3,000-$3,999/mo

4.7%

Source: ABS Census 2021, G38 Mortgage Repayment by SAL

Williamstown How People Get to Work

Car (driver)

80.5%

Did not go to work

12.6%

Car (passenger)

3.9%

Walked only

1.2%

Truck

0.9%

Other

0.4%

Motorbike/Scooter

0.3%

Bus

0.3%

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

Williamstown Car Ownership

0 vehicles

1.3%

1 vehicle

23.0%

2 vehicles

39.4%

3 vehicles

21.0%

4+ vehicles

15.2%

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

Williamstown Number of Bedrooms

1 bedroom

1.8%

2 bedrooms

8.8%

3 bedrooms

44.2%

4 bedrooms

38.0%

5 bedrooms

6.3%

6+ bedrooms

1.0%

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

Williamstown Population Mobility

8.2%

moved in the last year

30.8%

moved in the last 5 years

3.3%

unemployment rate (Census)

67.4%

labour force participation

Source: ABS Census 2021, G43 Summary by SAL

Williamstown Indigenous Population

1.3%

Aboriginal & Torres Strait Islander

Source: ABS Census 2021, G07 Indigenous Status by SAL

Williamstown Long-term Health Conditions

Mental health

297

Asthma

124

Arthritis

124

Diabetes

Heart disease

Lung condition

Cancer

Stroke

Kidney disease

Dementia

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

Williamstown Personal Weekly Income Distribution

$0 or less/wk

7.4%

$1-$149/wk

4.8%

$150-$299/wk

7.2%

$300-$399/wk

4.6%

$400-$499/wk

3.2%

$500-$649/wk

4.2%

$650-$799/wk

10.0%

$800-$999/wk

11.2%

$1,000-$1,249/wk

13.1%

$1,250-$1,499/wk

9.8%

$1,500-$1,749/wk

7.6%

$1,750-$1,999/wk

5.0%

$2,000-$2,999/wk

9.6%

$3,000-$3,499/wk

1.0%

$3,500+/wk

1.5%

Source: ABS Census 2021, G17 Personal Income by SAL

Williamstown Family Structure

Couple — children under 15

42.4%

Couple — no children

28.0%

Couple — no children under 15

19.4%

One parent — children under 15

7.0%

One parent — no children under 15

3.2%

Source: ABS Census 2021, G29 Family Composition by SAL

Williamstown Military Service

Current ADF — Regular

0.2% 5

Current ADF — Reserves

0.3% 7

Previously served

3.8% 88

Never served

95.6% 2,196

Source: ABS Census 2021, G22 ADF Service by SAL

Williamstown Unpaid Carers

Provided unpaid assistance

13.4% 306

Did not provide

86.6% 1,985

Source: ABS Census 2021, G25 Unpaid Assistance by SAL

Williamstown Children Ever Born

No children

26.2%

1 child

11.4%

2 children

35.6%

3 children

19.4%

4 children

6.8%

5+ children

0.6%

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

Williamstown When Migrants Arrived

Before 1951

1951–1960

1961–1970

129

1971–1980

1981–1990

1991–2000

2001–2010

2011–2015

2016

2018

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

Williamstown Unpaid Domestic Work

Less than 5 hours

20.8%

5–14 hours

33.9%

15–29 hours

16.3%

30+ hours

10.7%

Did not do domestic work

18.3%

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

Williamstown Household Size

1 person

19.7%

2 persons

34.2%

3 persons

17.2%

4 persons

17.5%

5 persons

8.7%

6+ persons

2.7%

Source: ABS Census 2021, G35 Household Size by SAL

Williamstown Where Residents Moved From

Same address

2,617

Moved from SA

152

Moved — same area (SA2)

Moved from NSW

Moved from WA

Moved from QLD

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

Williamstown Family Blending

Intact family — no other children

88.5%

Step family — no other children

5.9%

Blended family — no other children

4.4%

Intact family — other children present

1.2%

Source: ABS Census 2021, G31 Family Blending by SAL

Williamstown Crime Statistics

25 reported offences in 2025-26, by category.

Theft

Assault

Break & Enter

Other Against Person

Property Damage

Total offences by year

2021

2022

2023

2024

2025

Source: SA Government Open Data (data.sa.gov.au).

Williamstown Schools

schools nearby

government

1001

avg ICSEA score

184

total students

Williamstown Primary School Government

Primary · R-6 · 184 students

1001

ICSEA

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

All schools near Williamstown, with a map

Williamstown Rent Prices & Affordability

17% of median household income goes on median rent

Marks at 25% and 35%. Band: affordable.

Household income $1,782/wk

Median rent $300/wk

Rent to income 16.8%

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

Median rent in Williamstown against your income

Your weekly income

About $7,722 a month

Median rent $300/wk

Left after rent $1,482/wk

Rent share 16.8%

Cheaper alternatives with similar incomes

Moorak

Income: $817/wk Rent: $250/wk $50/wk less rent

Everard Park

Income: $744/wk Rent: $286/wk $14/wk less rent

Keith

Income: $746/wk Rent: $180/wk $120/wk less rent

Risdon Park South

Income: $713/wk Rent: $185/wk $115/wk less rent

Paringa

Income: $800/wk Rent: $200/wk $100/wk less rent

Renmark West

Income: $788/wk Rent: $200/wk $100/wk less rent

Whyalla Playford

Income: $771/wk Rent: $200/wk $100/wk less rent

Port Augusta West

Income: $720/wk Rent: $213/wk $87/wk less rent

Williamstown vs the typical SA suburb

The median personal income in Williamstown is $813 a week, 7% above the typical SA suburb ($759). That ranks 256th of 710 SA suburbs with 200 or more residents. Median rent is $300 a week, the same as the typical SA suburb. Rent takes 16.8% of the median household income here, against 19.5% in the typical SA suburb. The median resident is 42, 1 year younger than in the typical SA suburb (43).

The typical suburb is the median across suburbs with 200 or more residents. ABS Census 2021, calculated by GDP.com.au.
Measure	Williamstown	Typical SA	Typical Australia
Personal income	$813/wk	$759/wk	$766/wk
Household income	$1,782/wk	$1,494/wk	$1,637/wk
Rent	$300/wk	$300/wk	$330/wk
Mortgage repayment	$1,500/mo	$1,534/mo	$1,733/mo
Median age	42	43	42
Rent share of household income	16.8%	19.5%	20.3%

Suburbs near Williamstown

The closest suburb to Williamstown is Kersbrook, 8.5 km away.

Kersbrook

8.5 km away · income $876/wk · rent $300/wk

Lyndoch

9.1 km away · income $766/wk · rent $295/wk

Gawler East

13.7 km away · income $776/wk · rent $300/wk

Evanston Park

13.9 km away · income $713/wk · rent $330/wk

Gawler South

14.5 km away · income $715/wk · rent $260/wk

One Tree Hill

14.6 km away · income $842/wk · rent $305/wk

Compare Williamstown (SA)

Frequently Asked Questions About Williamstown

What is the population of Williamstown SA?

The population of Williamstown SA is 2,981 according to the ABS Census 2021.The suburb has a population density of 42 people per km².Williamstown is ranked #2,423 out of 14,663 suburbs by population.

What is the median income in Williamstown?

The median personal income in Williamstown SA is $813 per week, or $42,276 per year.The median household income is $1,782 per week.Family income is $2,063 per week.Williamstown is ranked #3,378 by income out of 14,663 Australian suburbs.

How much is rent in Williamstown?

Median rent in Williamstown SA is $300 per week ($1,300 per month).Rent represents 16.8% of household income, which is considered affordable.Williamstown ranks #4,529 out of 14,663 suburbs by rent.

What are mortgage repayments in Williamstown?

The median monthly mortgage repayment in Williamstown SA is $1,500. This data comes from the ABS Census 2021 and reflects mortgage repayments for owner-occupied dwellings.

What is the median age in Williamstown?

The median age in Williamstown SA is 42 years.This is older than the national median age of 38 years.

Is Williamstown a good suburb to live in?

Williamstown is a suburb in South Australia with a population of 2,981.The median income is $813/wk, which is above the typical SA suburb ($759/wk).Rent affordability is rated as affordable (16.8% of household income). See the full suburb profile above for detailed statistics.

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Australian Average Salary Australian House Prices Adelaide Cost of Living

Data: Australian Bureau of Statistics, Census of Population and Housing 2021. SA2 area: 41602. All dollar figures in AUD.