The suburb is bisected by the Mount Lindesay Highway. Once a rural community, it is developing into a low density residential suburb.
Park Ridge South was officially gazetted as a suburb in 1991. It was previously part of the Beaudesert Shire local government area. Rosia Road and Stoney Camp Road at Park Ridge South formed part of the boundary between the local government areas of Beaudesert Shire and Logan City. The 2008 Queensland Local Government amalgamations saw former suburbs of Beaudesert Shire including Park Ridge South becoming part of Logan City.
In the 2011 census, Park Ridge South recorded a population of 1,778 people, 49% female and 51% male. The median age of the Park Ridge South population was 40 years, 3 years above the national median of 37. 73.8% of people living in Park Ridge South were born in Australia. The other top responses for country of birth were England 6.2%, New Zealand 4.6%, Taiwan 1%, China 0.8%, Croatia 0.7%. 84.2% of people spoke only English at home; the next most common languages were 1.7% Khmer, 1.5% Mandarin, 1.1% Hmong, 1% Croatian, 0.7% Italian.