[3] Pinjar is a sparsely populated agricultural suburb, most of which is pine plantation and wetland.

At the 2006 Australian census, Pinjar had a population of 78 people living in 39 dwellings.

Pinjar is home to the Wanneroo Raceway, a 2.411 km (1.498 mi) road racing circuit.

The raceway which opened in 1969, is the home of motor racing in Western Australia and hosts an annual round of the Supercars Championship.

Pinjar Park is a 142-metre (155 yd) motorcycle speedway, and regularly hosts national and international meetings and caters to both senior and junior solo and sidecar racing.