Fairfield is predominantly residential, with a small north-eastern pocket remaining a light industrial area.

[citation needed] In the 2021 census, the most common ancestries were English 33.3%, Australian 28.0%, Irish 16.0%, Scottish 11.7 and Italian 10.2%.

73.8% of people were born in Australia with other common countries of birth being England 3.2%, Greece 2.6%, Italy 1.8%, and New Zealand 1.4%.

Most common languages, other than English spoken at home are Greek 5.5%, Italian 2.8%, Mandarin 1.1%, Spanish 1.1% and Vietnamese 1.0%.

There are also strong numbers of Chinese, Dutch, German and Indian residents in the suburb.