The size of Blyth is approximately 159.1 square kilometres. It has 3 parks. The population of Blyth in 2011 was 611 people. By 2016 the population was 513 showing a population decline of 16.0% in the area during that time. The predominant age group in Blyth is 0-9 years. Households in Blyth are primarily couples with children and are likely to be repaying $1000 - $1399 per month on mortgage repayments. In general, people in Blyth work in a labourer occupation. In 2011, 78.8% of the homes in Blyth were owner-occupied compared with 78.2% in 2016. Currently the median sales price of houses in the area is $250,000.