Illawarra is region in New South Wales, Australia.
Illawarra may also refer to:
- Illawarra (spider), a genus of spider
- Illawarra cattle, breed of dairy cattle
- Illawarra Coke Company, in Coalcliff and Coledale, New South Wales, Australia
- Illawarra escarpment, south of Sydney, Australia
- Illawarra Flame Tree, a species of tree scientifically classified as Brachychiton acerifolius
- Illawarra Hawks, a National Basketball League team
- Illawarra Mercury, a daily newspaper serving the Illawarra region
- Illawarra Steelers, the half of the St. George Illawarra Dragons (referred to above) joint venture that originates from the Illawarra region of New South Wales
- Lake Illawarra, near Wollongong, New South Wales, Australia