Theodore (ACT), ACT

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

82/100

Suburb Score

Among Australia's more advantaged suburbs

Theodore (ACT) is more socio-economically advantaged than about 82% of the 14,462 Australian suburbs we score, based on the ABS SEIFA index (raw score 1048, 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.

Theodore (ACT) at a glance

Population (2021): 3,798
Median age: 36
Median weekly household income: $2,588
SEIFA score: 1048
Coordinates: -35.4486, 149.1197

Theodore (ACT) demographics (2021 Census)

The figures below profile Theodore (ACT) 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 29%, 18% of homes are rented, and 18% of residents were born overseas.

Age profile

Age group	People	Share
Children (0–14)	730	19%
Youth (15–24)	535	14%
Young adults (25–44)	1,067	28%
Mid-life (45–64)	1,109	29%
Seniors (65+)	362	10%

Share of the 3,803 people counted by age.

Housing and households

Tenure	Dwellings	Share
Owned outright	342	26%
Owned with a mortgage	723	55%
Rented	234	18%

Dwelling type	Dwellings	Share
Houses	1,252	95%
Townhouses & semis	64	5%
Flats & apartments	0	0%

Tenure and dwelling shares are of the roughly 1,316 occupied private dwellings in Theodore (ACT).

Median weekly rent: $430
Median monthly mortgage: $2,002
Average household size: 2.8 people
Median weekly family income: $2,880
Median weekly personal income: $1,195

Community and culture

Born overseas: 671 (18%)
Speaks a language other than English at home: 486 (13%)
Aboriginal and/or Torres Strait Islander: 137 (4%)

Work and education

Completed Year 12: 1,947 (67%)
Labour-force participation: 74.6%
Unemployment rate: 4.2%
Employed full-time: 1,478
Employed part-time: 578

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 Theodore (ACT)

Based on 2014–2023 records, the warmest month in Theodore (ACT) is January (average daytime high around 25.4°C) and the coolest is July (around 8.9°C). The area receives roughly 890 mm of rain across the year.

Month	Avg high	Avg low	Rain
Jan	25.4°C	13.1°C	89 mm
Feb	23.9°C	12.1°C	71 mm
Mar	20.8°C	10.4°C	88 mm
Apr	17°C	7.1°C	61 mm
May	12.6°C	2.9°C	46 mm
Jun	9.5°C	1.2°C	66 mm
Jul	8.9°C	0.3°C	42 mm
Aug	10.1°C	0.3°C	70 mm
Sep	13.9°C	2.6°C	68 mm
Oct	17.6°C	5.8°C	87 mm
Nov	20.4°C	8.2°C	106 mm
Dec	23.4°C	10.9°C	96 mm

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

Common questions about Theodore (ACT)

Where is Theodore (ACT)?

Theodore (ACT) is a suburb of Australian Capital Territory, Australia.

What is the population of Theodore (ACT)?

At the 2021 Census, Theodore (ACT) had a population of about 3,798.

Is Theodore (ACT) an advantaged area?

Theodore (ACT) has an ABS SEIFA score of 1048, where about 1000 is the national average — higher scores indicate greater relative socio-economic advantage. That gives it a Suburb Score of 82 out of 100 — more socio-economically advantaged than about 82% of Australian suburbs.

What is the weather like in Theodore (ACT)?

Theodore (ACT) has average daytime highs of about 17°C and overnight lows of about 6.2°C, with roughly 890 mm of rain across the year (based on 2014–2023 climate normals).