Diana Muriel Warnock OAM (née Robinson; born 3 October 1940 in Western Australia) is a former Western Australian radio broadcaster, women's rights activist and state politician. Warnock worked as a journalist with the Perth Daily News, and as a radio broadcaster with 720 ABC Perth, 6PR and 6NR. In 1996, Warnock and upper house MP Cheryl Davenport steered a controversial pro-choice bill through the parliament—the "Acts Amendment (Abortion) Bill", which effectively decriminalised abortion and enabled women to access abortions of pregnancies up to 20 weeks on the basis of informed consent.