Agnes G. Murphy (1865 – 15 March 1931), was an Irish journalist and writer who wrote the first biography of Dame Nellie Melba.

Born in Tullamore, King's County, Ireland in 1865, Agnes Murphy spent much of her life travelling and writing.

While in Melbourne, in 1890 Murphy was a founder of Austral Salon which was created to support the intellectual advancement of the women of Australia.

[21] On arrival she sold her novel immediately and began working for a wide variety of British newspapers as well including The Pall Mall Gazette.

[28] After her death the Melbourne papers published a poem Murphy had written to her lifelong partner Aimee Moore.