Ruth Milne Hall, OAM, FAA, FAAM (born 6 August 1945) is an Australian microbiologist whose research on mobile genetic elements in bacteria has identified the mechanism for spread of antibiotic resistance in bacteria.
She attended Hornsby Girls High School and graduated from the University of Sydney with a BSc(Hons) (1966) and MSc (1968) before taking up a scholarship to do a PhD course on bacterial genetics in the MRC Microbial Genetics Unit at the University of Edinburgh (awarded 1971).