Caroline Springs is a suburb in Melbourne, Victoria, Australia, 21 km (13 mi) west of Melbourne's Central Business District, located within the City of Melton local government area. Caroline Springs recorded a population of 24,488 at the 2021 census. Caroline Springs has been developed on greenfield land since 1999 by Delfin, in partnership with the original landowners. Centrally located, just north of Kororoit Creek, is the town square and main shopping centre, known as CS Square, and a man-made lake known as Lake Caroline. The Caroline Springs Post Office opened on 8 August 2005.