Ralph Anthony Charles de Boissière (6 October 1907 – 16 February 2008) was a Trinidad-born Australian social realist novelist.
Described as "an outspoken opponent of racism, injustice, greed and corruption, a passionate humanist with a vision of a just society", he was the author of four novels although most acclaimed for the first two: Crown Jewel and Rum and Coca-Cola, both originally published in the 1950s.
A fifth novel called Homeless in Paradise remains unpublished.