Hillier is a western suburb of the Gawler local government area.

[5] The majority of residents (62.3%) are of Australian birth, with other common census responses being England (21.6%), Scotland (2.1%) and Vietnam (1.4%).

[5] The age distribution of Hillier residents is skewed higher than the greater Australian population.

[5] Local newspapers include the News Review Messenger and The Bunyip.

[4] Murray Hillier Reserve is located between Clifford Road and the Gawler River.