The size of Basalt is approximately 13,987.6 square kilometres. It has 23 parks covering nearly 4.4% of total area. The population of Basalt in 2011 was 229 people. By 2016 the population was 220 showing a population decline of 3.9% in the area during that time. The predominant age group in Basalt is 50-59 years. Households in Basalt are primarily childless couples and are likely to be repaying under $300 per month on mortgage repayments. In general, people in Basalt work in a managers occupation. In 2011, 57.9% of the homes in Basalt were owner-occupied compared with 55% in 2016.