Thornhill Park, VIC

By Lauren McCaleb · Reviewed by Dylan Duncan · Updated 30 May 2026

63/100

Suburb Score

More advantaged than the national average

Thornhill Park is more socio-economically advantaged than about 63% of the 14,462 Australian suburbs we score, based on the ABS SEIFA index (raw score 1010, where about 1000 is the national average).

A socio-economic measure from ABS Census data — not a measure of how good a suburb is to live in or visit. How we calculate this.

Thornhill Park at a glance

Population (2021): 3,066
Median age: 29
Median weekly household income: $2,005
SEIFA score: 1010
Coordinates: -37.7243, 144.6349

Thornhill Park demographics (2021 Census)

The figures below profile Thornhill Park using the Australian Bureau of Statistics 2021 Census; every percentage is a share of a clearly stated Census count, so each one traces back to the source. At a glance, the largest age group is young adults (25–44) at 49%, 25% of homes are rented, and 50% of residents were born overseas.

Age profile

Age group	People	Share
Children (0–14)	822	27%
Youth (15–24)	292	10%
Young adults (25–44)	1,501	49%
Mid-life (45–64)	359	12%
Seniors (65+)	93	3%

Share of the 3,067 people counted by age.

Housing and households

Tenure	Dwellings	Share
Owned outright	48	5%
Owned with a mortgage	664	67%
Rented	245	25%

Dwelling type	Dwellings	Share
Houses	963	97%
Townhouses & semis	27	3%
Flats & apartments	0	0%

Tenure and dwelling shares are of the roughly 990 occupied private dwellings in Thornhill Park.

Median weekly rent: $380
Median monthly mortgage: $1,950
Average household size: 3 people
Median weekly family income: $2,077
Median weekly personal income: $971

Community and culture

Born overseas: 1,479 (50%)
Speaks a language other than English at home: 1,673 (58%)
Aboriginal and/or Torres Strait Islander: 14 (0%)

Work and education

Completed Year 12: 1,555 (71%)
Labour-force participation: 74.2%
Unemployment rate: 6.7%
Employed full-time: 1,010
Employed part-time: 419

Source: ABS Census of Population and Housing, 2021 (General Community Profile, by Suburb and Locality). © Australian Bureau of Statistics, released under CC BY 4.0. How we group bands and derive each share is set out on our methodology page.

Weather and climate in Thornhill Park

Based on 2014–2023 records, the warmest month in Thornhill Park is January (average daytime high around 26.6°C) and the coolest is July (around 12.9°C). The area receives roughly 658 mm of rain across the year.

Month	Avg high	Avg low	Rain
Jan	26.6°C	14.8°C	57 mm
Feb	25.5°C	14.2°C	29 mm
Mar	23.8°C	13.3°C	42 mm
Apr	19.9°C	10.8°C	57 mm
May	16.1°C	8.6°C	53 mm
Jun	13.4°C	6.8°C	58 mm
Jul	12.9°C	6.2°C	46 mm
Aug	13.6°C	6.3°C	52 mm
Sep	16.2°C	7.3°C	57 mm
Oct	19.4°C	8.8°C	71 mm
Nov	21.5°C	10.7°C	70 mm
Dec	24.2°C	12.5°C	66 mm

Climate normals, 2014–2023 (Open-Meteo, ERA5 reanalysis).

Common questions about Thornhill Park

Where is Thornhill Park?

Thornhill Park is a suburb of Victoria, Australia.

What is the population of Thornhill Park?

At the 2021 Census, Thornhill Park had a population of about 3,066.

Is Thornhill Park an advantaged area?

Thornhill Park has an ABS SEIFA score of 1010, where about 1000 is the national average — higher scores indicate greater relative socio-economic advantage. That gives it a Suburb Score of 63 out of 100 — more socio-economically advantaged than about 63% of Australian suburbs.

What is the weather like in Thornhill Park?

Thornhill Park has average daytime highs of about 19.4°C and overnight lows of about 10°C, with roughly 658 mm of rain across the year (based on 2014–2023 climate normals).