Kate Roberts (13 February 1891 – 4 April 1985) was one of the foremost Welsh-language authors of the twentieth century. Known as Brenhines ein llên ("The queen of our literature"), she is known mainly for her short stories, but she also wrote novels. Roberts was also a prominent Welsh nationalist.
Roberts was born in the village of Rhosgadfan, Caernarfonshire (Gwynedd today) where her father (Owen Roberts) was a quarryman in the local slate quarries. She graduated in Welsh at the University College of North Wales, Bangor and then trained as a teacher. She then taught in various schools in south Wales.
Roberts met Morris T. Williams at Plaid Cymru (the Welsh nationalist party) meetings, and later married him in 1928. Williams was a printer, and eventually they bought the printing and publishing house Gwasg Gee (The Gee Press), Denbigh, and moved to live in the town in 1935. The press published books, pamphlets and the Welsh-language weekly Y Faner (The Banner), for which Roberts wrote regularly. After her husband's death in 1946 she carried on working the press for another ten years.