Catrin Stevens hails from Llan-non, Ceredigion. She was educated at Ardwyn Grammar School, Aberystwyth, and the University of Wales College Bangor, where she gained an MA degree and won the Urdd National Eisteddfod Crown in 1972.
During the 1970s, she was a member of staff at the Welsh Folk Museum, St Fagans, and published widely on aspects of Welsh folk culture. In 1988 she joined the staff of Trinity College Carmarthen, and was later appointed as director of Humanities and head of the History Department. Under her leadership, a number of Welsh medium degree schemes were established at Trinity College in the late 1990s. She then spent two years (2006-08) on the staff of the Centre for Welsh Medium Higher Education, predecessor to the Coleg.
She was responsible – with Dr Dylan Phillips – for establishing the foundations of the staff training and development programme that the Coleg now provides.
Over the last few years she has worked as a freelance writer, publishing a large number of books for younger readers. She was also the national president of Merched y Wawr. She has lived in Loughor, Swansea, for many years, and she plays a prominent role in Welsh language life in the area.