The size of Trevallyn is approximately 9.9 square kilometres.
It has 13 parks covering nearly 15.2% of total area.
The population of Trevallyn in 2011 was 4,638 people.
By 2016 the population was 4,567 showing a population decline of 1.5% in the area during that time.
The predominant age group in Trevallyn is 40-49 years.
Households in Trevallyn are primarily couples with children and are likely to be repaying $1000 – $1399 per month on mortgage repayments.
In general, people in Trevallyn work in a professional occupation.
In 2011, 72.9% of the homes in Trevallyn were owner-occupied compared with 72.8% in 2016.
Currently the median sales price of houses in the area is $350,000.
Data taken from RPDATA.COM.AU