Symonston, ACT

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

2/100

Suburb Score

Among Australia's less advantaged suburbs

Symonston is more socio-economically advantaged than about 2% of the 14,462 Australian suburbs we score, based on the ABS SEIFA index (raw score 781, 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.

Symonston at a glance

Population (2021): 655
Median age: 55
Median weekly household income: $841
SEIFA score: 781
Coordinates: -35.3470, 149.1572

Symonston demographics (2021 Census)

The figures below profile Symonston 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 mid-life (45–64) at 37%, 30% of homes are rented, and 27% of residents were born overseas.

Age profile

Age group	People	Share
Children (0–14)	42	6%
Youth (15–24)	51	8%
Young adults (25–44)	136	21%
Mid-life (45–64)	238	37%
Seniors (65+)	185	28%

Share of the 652 people counted by age.

Housing and households

Tenure	Dwellings	Share
Owned outright	168	64%
Owned with a mortgage	4	2%
Rented	80	30%

Dwelling type	Dwellings	Share
Houses	88	34%
Townhouses & semis	21	8%
Flats & apartments	0	0%

Tenure and dwelling shares are of the roughly 259 occupied private dwellings in Symonston.

Median weekly rent: $275
Median monthly mortgage: $599
Average household size: 1.6 people
Median weekly family income: $1,215
Median weekly personal income: $605

Community and culture

Born overseas: 117 (27%)
Speaks a language other than English at home: 66 (15%)
Aboriginal and/or Torres Strait Islander: 24 (4%)

Work and education

Completed Year 12: 167 (28%)
Labour-force participation: 36.6%
Unemployment rate: 13.5%
Employed full-time: 117
Employed part-time: 65

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 Symonston

Based on 2014–2023 records, the warmest month in Symonston is January (average daytime high around 27°C) and the coolest is July (around 10.1°C). The area receives roughly 742 mm of rain across the year.

Month	Avg high	Avg low	Rain
Jan	27°C	14.5°C	71 mm
Feb	25.4°C	13.6°C	50 mm
Mar	22.5°C	12.2°C	67 mm
Apr	18.6°C	8.7°C	54 mm
May	13.8°C	4.4°C	42 mm
Jun	10.8°C	2.7°C	61 mm
Jul	10.1°C	1.7°C	37 mm
Aug	11.3°C	1.9°C	69 mm
Sep	15°C	4.3°C	57 mm
Oct	18.9°C	7.4°C	75 mm
Nov	21.7°C	9.8°C	85 mm
Dec	24.8°C	12.4°C	74 mm

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

Common questions about Symonston

Where is Symonston?

Symonston is a suburb of Australian Capital Territory, Australia.

What is the population of Symonston?

At the 2021 Census, Symonston had a population of about 655.

Is Symonston an advantaged area?

Symonston has an ABS SEIFA score of 781, where about 1000 is the national average — higher scores indicate greater relative socio-economic advantage. That gives it a Suburb Score of 2 out of 100 — more socio-economically advantaged than about 2% of Australian suburbs.

What is the weather like in Symonston?

Symonston has average daytime highs of about 18.3°C and overnight lows of about 7.8°C, with roughly 742 mm of rain across the year (based on 2014–2023 climate normals).