In 2016, the population of Hornsby City was 142,667. Men made up 48.8% of the population, while females accounted for 51.2%. Additionally, 0.5% of the population was Aboriginal and/or Torres Strait Islander. The population was most ethnically diverse in Hornsby City, with a mix of British, Irish, and South Asian residents.
In addition to housing, the suburb has a vibrant commercial district. Today, Hornsby is still a thriving commercial area, and one hundred years ago, it was a very different city. In terms of population, the two sides of the railway line have distinct characteristics. The north-western portion is occupied by various industries, such as the railway workshop. Its southern end, on the other hand, is home to a large war memorial and the adjacent RSL club.
Before the arrival of motor vehicles, the area was rural. However, the introduction of the Main North railway line, which connected Sydney and Newcastle, changed that. In the 1950s, automobiles became common, and the area began to develop as a suburban neighborhood. By 1906, the Hornsby Shire was incorporated as a local government authority. Its population has increased by almost one-half since.
Approximately 58.8% of people in Hornsby City are married. However, the number of single people is considerably lower than the number of married residents. In addition, 5.0% of the population is de facto. There are several other interesting facts regarding the local population, such as how many people live in single households. The median age is 30 years old and the average household income is $9,500.