Cardiff is a suburb of the City of Lake Macquarie, New South Wales, Australia. It is located 13 kilometres (8 mi) west-southwest of Newcastle's central business district in the City of Lake Macquarie North Ward.
An irregularly shaped suburb, Cardiff is home to two government primary schools, a Catholic primary school and a government high school. Like most major suburbs in Lake Macquarie, it has its own commercial centre with a post office, pub (hotel), real estate agencies, take-away shops, a video store, tattoo studio, two opportunity stores, numerous hairdressers and two supermarkets.
The local police station no longer provides counter services, having been converted into a centre for Highway Patrol officers in around 1998.