Robin Holliday (FRS, FAA) (6 November 1932 – 9 April 2014) was a British molecular biologist. Holliday described a mechanism of DNA-strand exchange that attempted to explain gene-conversion events that occur during meiosis in fungi. That model first proposed in 1964 and is now known as the Holliday Junction.

Holliday held a B.A. in Natural Sciences and a PhD in Genetics from Cambridge University. He was a Fellow of the Royal Society, a Fellow Australian Academy of Science (FAA), a member of the European Molecular Biology Organization, a Foreign Fellow of the Indian National Science Academy, and held the 1987 Lord Cohen Medal for Gerontological research. He was formerly the Head of the Genetics Division, National Institute for Medical Research, (Medical Research Council), Mill Hill, London, UK, and prior to his death was a retired Chief Research Scientist, CSIRO Division of BioMolecular Engineering, Sydney, Australia.