DescriptionPennington is a northern suburb of Adelaide, South Australia, located about 10 km from the Adelaide city centre. It is located in the City of Charles Sturt. In the 2011 Australian census the population of Pennington was 3,649 when there were 1,852 Females and 1,797 Males living there. The median age for people living in Pennington was 38. Pennington is residential, apart from a light industrial pocket to the south.