Ruby Lindsay (20 March 1885 – 12 March 1919) was an Australian illustrator and painter, sister of Norman Lindsay and Percy Lindsay.
Lindsay was born in Creswick, Victoria, the seventh child and second daughter of Robert and Jane Lindsay, and lived in Melbourne from the age of 16 with her brother Percy while studying at the National Gallery of Victoria School.
Lindsay drew occasionally for The Bulletin and illustrated William Moore's Studio Sketches (1906) and designed posters. On 30 September 1909 she married Will Dyson. In 1912, she contributed illustrations to the book Epigrams of Eve by child welfare advocate and journalist Sophie Irene Loeb. After World War I she visited relations in Ireland and died during the Spanish flu influenza epidemic.