Danaher is the author of 10 books about Irish traditional customs and beliefs, the best known of which are The Year in Ireland, In Ireland Long Ago, and Folktales from the Irish Countryside. A respected scholar, Danaher published more than 200 articles in academic journals.
Kevin Danaher was born in Athea (Ath an tSleibhe), County Limerick, Ireland, on 30 January 1913. Danaher's father, William, was the local schoolmaster. His early education was at Athea National School and Mungret College, County Limerick. In 1934, Danaher became a part-time collector for the Irish Folklore Commission.
Danaher attended University College Dublin, graduating with a BA in 1937. He was awarded a fellowship by the Alexander von Humboldt Foundation to carry out postgraduate studies in Germany, and studied comparative folklore and ethnology for two years at the Universities of Berlin and Leipzig.
When World War II broke out, Danaher returned to Ireland and joined the Irish Army. He rose to the rank of captain, and served as an instructor for the Artillery Corps, training soldiers in Kildare, Ireland.
In early 1940 he once again worked for the Irish Folklore Commission, first as a field worker and then as the Commission's official ethnographer, collecting, cataloguing and illustrating large amounts of traditional tales and folklore, primarily from his home county of Limerick. Some of his sources were family members, such as his father, Liam. His groundbreaking work in the area of seasonal customs and folk practices would later appear in his many articles and books.
After further education abroad, in 1971 Danaher was appointed a statutory lecturer in Irish Folklore at University College Dublin. In 1974 he was awarded the degree of Doctor of Literature by the National University of Ireland in recognition of his original contribution to scholarship.
From 1973 through his retirement in 1983 Danaher was lecturer for the Department of Irish Folklore, University College Dublin. As an expert in military history, he was a member of the Irish Military History Society, serving on their council in a variety of capacities. He was the group's president from 1971 through 1980, and editor of their journal, The Irish Sword, from 1960 through 1970. He was also a member of The Royal Society of Antiquaries of Ireland and contributed to the Society's journal. From 1988 through 2002 he served as co-Patron of the Folklore of Ireland Society, and continued to publish article in their journal, Bealoideas as he had done regularly since 1935.
When Danaher retired from his position at University College Dublin, his students organised a celebratory volume in his honour: Sinsear: The Folklore Journal 4 (1982–83). Many of his students, colleagues and prominent scholars made up the international roster of writers paying tribute to Danaher, his work, and his influence. At the same time, his academic colleagues organised the publication of a festschtift, Gold Under the Furze
- Note on nomenclature: Danaher published his "popular" writings, on folklore and military history, as "Kevin Danaher". His "academic" works were signed with his Irish name, Caoimhín Ó Danachair.
- The Danish Force in Ireland 1690–91 (With Dr. J. G. Simms) (1962) Dublin, Stationery Office for the Irish Manuscripts Commission. – A scholarly edition of original documents and letters relating to the Danish mercenaries in the Williamite war.
- In Ireland Long Ago (1962) Dublin, Mercier Press. ISBN 0-85342-781-X. – Danaher's 1st collection of popular articles
- Irish Customs and Beliefs (Originally published as Gentle Places and Simple Things) (1964) Cork, Mercier Press. ISBN 1-85635-442-3 Danaher's 2nd collection of popular articles
- Irish Country People (1966) Cork, Mercier Press. – Danaher's 3rd collection of popular articles
- Folktales from the Irish Countryside Dublin, Mercier Press. (1967) ISBN 0-85342-849-2. – Stories collected by Danaher in West Co. Limerick.
- The Pleasant Land of Ireland (1970) Cork, Mercier Press. – The scripts of the television series "The Hearth and Stool and All".
- The Year in Ireland (1972) Dublin, Mercier Press. ISBN 1-85635-093-2. – Customs and ceremonies relating to feast-days and different seasons of the year.
- Foirgneamh na nDaoine: Ireland's Vernacular Architecture (1975) Cork, Mercier Press. – A fully illustrated account of traditional house designs and construction. This was also published in a new edition with many new illustrations as
- Ireland's Traditional Houses Dublin, Bord Fáilte. ISBN 0-901146-12-9
- A Bibliography of Irish Ethnology and Folk Tradition (as Caoimhín Ó Danachair) (1978) Cork, Mercier Press.
- "That's How it Was" (1984) Cork, Mercier Press. ISBN 0-85342-714-3 – Danaher's 4th collection of popular articles
- The Children's Book of Irish Folktales (1984) Dublin, Mercier Press. ISBN 0-85342-718-6. – Selected stories from Folktales from the Irish Countryside, simplified and illustrated.
- The Hearth and Stool and All!: Irish Rural Households (1985) Cork, Mercier Press. ISBN 0-85342-734-8 – The guidebook to the Bunratty Folk Park, revised and expanded.
In the Spring of 1968, Danaher presented a 5-part TV programme about Irish Traditions, "The Hearth and Stool and All".
- Lysaght, Patricia. "Kevin Danaher, 1913–2002 Archived 14 May 2006 at the Wayback Machine – Caoimhin O Danachair – In Memoriam – Obituary" in Folklore, Volume: 113, Issue: 2, Oct. 2002. Accessed 8 February 2007
- Gailey, Alan, and Lynch, Chris. "Obituary", Folk Life, Summer 2002
- Hogan, Patrick, "Obituary", The Irish Sword, Summer 2002
- "Obituary", The Irish Times, 23 March 2002
- "Obituary", The Guardian, 27 April 2002
- Gailey, Alan, and Ó hÓgáin, Daithí (editors) Gold Under the Furze (Glendale Press, Dublin, 1983) Festschrift – includes a full bibliography of Danaher's published work in the field of folklore, and a selection of his photographs.