9 genera with c. 100 species, mostly south-west Pacific region, central and South America and Madagascar; 2 genera in Australia.
Source:
Raleigh, R.E.; Entwisle, T.J. (1996). Winteraceae. In: Walsh, N.G.; Entwisle, T.J., Flora of Victoria Vol. 3, Dicotyledons Winteraceae to Myrtaceae, pp. 21–23. Inkata Press, Melbourne.