Croydon South is a suburb of Melbourne, Victoria, Australia, 30 km east of Melbourne's Central Business District. Its local government area is the City of Maroondah. At the 2011 Census, Croydon South had a population of 4,523.
Croydon South has a small shopping strip, on the corner of Eastfield and Bayswater Roads, incorporating over 20 retail outlets and a Post Office. It is close to the foothills of Mount Dandenong and the Dandenong Ranges.
Croydon South Post Office opened on 1 February 1961 as the suburb was developed.
In term one of the 2009 school year, Croydon South Primary School merged with Tinternvale Primary School. Unfortunately, falling enrolments have necessitated the merger. The Education Department agreed to a large increase in funding for the merger at the Tinternvale site and to bring the newly merged school into line with current standards.