Trevallyn, TAS
By Lauren McCaleb · Reviewed by Dylan Duncan ·
Trevallyn is a residential suburb on the western edge of Launceston, set above the meeting of the South Esk and Tamar Rivers and split between the Launceston and West Tamar council areas. Gazetted as a locality in 1963, it takes its name from Trevallyn in Cornwall — in the Cornish tongue 'tre' means a town or settlement and the second part derives from a word for a mill. A curiosity of its past is that the local post office of the 1930s used the name spelled backwards, Nyllavert, which still lingers in some old lists of places. The suburb is best known as the gateway to the Cataract Gorge, the dramatic river gorge that is one of Launceston's great natural landmarks, and to the Trevallyn Dam and the bushland of the Trevallyn Nature Recreation Area, used for trail running, horse riding and mountain biking. The novelist Katharine Susannah Prichard spent part of her childhood here, and the Trevallyn Cricket Club has played at the Gorge Road oval since 1929.
More advantaged than the national average
Trevallyn is more socio-economically advantaged than about 66% of the 14,462 Australian suburbs we score, based on the ABS SEIFA index (raw score 1015, 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.
Trevallyn at a glance
- Population (2021)
- 4,826
- Median age
- 40
- Median weekly household income
- $1,614
- SEIFA score
- 1015
- Coordinates
- -41.4425, 147.1004
Trevallyn demographics (2021 Census)
The figures below profile Trevallyn 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 27%, 26% of homes are rented, and 17% of residents were born overseas.
Age profile
| Age group | People | Share |
|---|---|---|
| Children (0–14) | 888 | 18% |
| Youth (15–24) | 548 | 11% |
| Young adults (25–44) | 1,257 | 26% |
| Mid-life (45–64) | 1,308 | 27% |
| Seniors (65+) | 842 | 17% |
Share of the 4,843 people counted by age.
Housing and households
| Tenure | Dwellings | Share |
|---|---|---|
| Owned outright | 705 | 37% |
| Owned with a mortgage | 683 | 36% |
| Rented | 492 | 26% |
| Dwelling type | Dwellings | Share |
|---|---|---|
| Houses | 1,752 | 92% |
| Townhouses & semis | 104 | 5% |
| Flats & apartments | 58 | 3% |
Tenure and dwelling shares are of the roughly 1,914 occupied private dwellings in Trevallyn.
- Median weekly rent
- $300
- Median monthly mortgage
- $1,387
- Average household size
- 2.4 people
- Median weekly family income
- $2,111
- Median weekly personal income
- $845
Community and culture
- Born overseas
- 788 (17%)
- Speaks a language other than English at home
- 375 (8%)
- Aboriginal and/or Torres Strait Islander
- 116 (2%)
Work and education
- Completed Year 12
- 2,285 (61%)
- Labour-force participation
- 66%
- Unemployment rate
- 4.9%
- Employed full-time
- 1,402
- Employed part-time
- 951
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 Trevallyn
Based on 2014–2023 records, the warmest month in Trevallyn is January (average daytime high around 24°C) and the coolest is July (around 10.9°C). The area receives roughly 778 mm of rain across the year.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 24°C | 12.2°C | 54 mm |
| Feb | 22.6°C | 11.6°C | 53 mm |
| Mar | 20.6°C | 10.3°C | 61 mm |
| Apr | 17.1°C | 7.5°C | 53 mm |
| May | 13.6°C | 5.2°C | 72 mm |
| Jun | 11.4°C | 3.4°C | 72 mm |
| Jul | 10.9°C | 3°C | 89 mm |
| Aug | 11.8°C | 2.8°C | 68 mm |
| Sep | 14.1°C | 4.3°C | 59 mm |
| Oct | 16.4°C | 6°C | 82 mm |
| Nov | 19°C | 8.3°C | 50 mm |
| Dec | 21.6°C | 10.1°C | 65 mm |
Climate normals, 2014–2023 (Open-Meteo, ERA5 reanalysis).
Common questions about Trevallyn
Where is Trevallyn?
Trevallyn is a suburb of Tasmania, Australia.
What is the population of Trevallyn?
At the 2021 Census, Trevallyn had a population of about 4,826.
Is Trevallyn an advantaged area?
Trevallyn has an ABS SEIFA score of 1015, where about 1000 is the national average — higher scores indicate greater relative socio-economic advantage. That gives it a Suburb Score of 66 out of 100 — more socio-economically advantaged than about 66% of Australian suburbs.
What is the weather like in Trevallyn?
Trevallyn has average daytime highs of about 16.9°C and overnight lows of about 7.1°C, with roughly 778 mm of rain across the year (based on 2014–2023 climate normals).
How big is Trevallyn?
Trevallyn is one of the most populous suburbs in Tasmania — the 25th-largest by usual resident population at the 2021 Census (about 4,826 usual residents).
Where Trevallyn ranks
Trevallyn appears in these data-driven guides — each a transparent sort on a single ABS figure shown on this page.
- Largest suburbs in Tasmania#25 of 25
Nearby suburbs in Tasmania
More suburb guides in Tasmania
Other hand-written, cited guides — browse all guides.