| Type: | suburb |
| Cardiff South | |
| City: | Newcastle |
| State: | nsw |
| Alternative Location Map: | Australia Hunter Central Coast |
| Pushpin Label Position: | left |
| Lga: | City of Lake Macquarie |
| Postcode: | 2285 |
| Pop: | 2,931 |
| Area: | 1.6 |
| Parish: | Kahibah |
| Stategov: | Lake Macquarie |
| Fedgov: | Shortland |
| Dist1: | 13 |
| Dir1: | WSW |
| Location1: | Newcastle |
| Dist2: | 5 |
| Dir2: | WNW |
| Location2: | Charlestown |
| Near-Nw: | Cardiff |
| Near-N: | Cardiff |
| Near-Ne: | Cardiff |
| Near-W: | Macquarie Hills |
| Near-E: | Cardiff |
| Near-Sw: | Lakelands |
| Near-S: | Warners Bay |
| Near-Se: | Hillsborough |
Cardiff South is a suburb of the City of Lake Macquarie, New South Wales, Australia, located 13km (08miles) west-southwest of Newcastle's central business district. It is part of the City of Lake Macquarie north ward.
Cardiff South was originally composed of three separate suburbs: Cardiff South, Evelien, and Coalbrook.
Its soccer team, the South Cardiff Gunners play in the NBN State Football League, the top soccer competition in Newcastle.