| Year | Title | Publisher | Thomas's place | Notes |
| 1946 | The Stones of the Field | Druid Press, Carmarthen | Manafon | The cover was designed by his wife. |
| 1952 | An Acre of Land | Montgomeryshire Printing Company, Newrtown | Manafon | Published locally, this book went through the 2nd impression. |
| 1953 | The Minister | Montgomeryshire Printing Company, Newtown | Manafon | Radio drama for Radio Poems broadcasted on 18 September 1952 in BBC Wales. |
| 1955 | Song at the Year's Turning | Hart-Davis, London | Manafon | This book contains new poems, The Minister and selections from his first 2 books with an introduction by John Betjeman. |
| 1958 | Poetry for Supper | Hart-Davis, London | Eglwys-fach | Although R.S.Thomas was in Eglwys-fach, his subject of poetry was still in Manafon. Since this volume, he began to refer to bread and wine. |
| 1960 | Judgment Day | Poetry Book Society | Eglwys-fach | Limited 1000 facsimile holograph copies with drawings by Ceri Richard. The poetry itself is included in Tares. |
| 1961 | Tares | Hart-Davis, London | Eglwys-fach | The title is taken from St. Matthew xiii, 27. Prytherch, the hill farmer on Manafon hill, is now a historical hero and becoming a legendary one. |
| 1963 | The Bread of Truth | Hart-Davis, London | Eglwys-fach | Most of the poetry are addressed to Wales and some of them are harsh because of their few foot notes. The mood gets husher yet more poignant. |
| 1966 | Pieta | Hart-Davis, London | Eglwys-fach | This book includes two famous poetry, "Pieta" and "In a Church." |
| 1968 | Not That He Brought Flowers | Hat-Davis, London | Aberdaron | The poems were written in Eglwys-fach. Iago Prytherch, a familiar character to his readers, dissapeares since this volume. |
| 1968 | The Mountains | Chilmark Press | Aberdaron | With wood-engravings by Reynolds Stone after drawings by John Piper. |
| 1972 | H'm | Macmillan, London | Aberdaron | The theme for his poetry changes from the bleak Welsh landscape into "absent" or "dark" God. |
| 1972 | Young and Old | Chatto and Windus, London | Aberdaron | Published in the series of Chatto Poets for the Young |
| 1973 | Selected Poems | Hart-Davis, MacGibbon, London | Aberdaron | - |
| 1974 | What is a Welshman? | Christopher Davies, Swansea | Aberdaron | This contains 12 new poems. |
| 1975 | Laboratories of the Spirit | Macmillan, London | Aberdaron | - |
| 1977 | The Way of It | Ceolfrith Press, Sunderland | Aberdaron | This book include new 18 Poems with drawings by Barry Hirst. |
| 1978 | Frequencies | Macmillan, London | Aberdaron | One of his finest works. Iago Prytherch, who had vanised since 1968, appeared in "Gone?" again. |
| 1981 | Between Here and Now | Macmillan, London | Sarn y Plas | This volume is divided into two sections. The first section entitled 'Impressions' contains poems inspired by the Impressionist paintings. |
| 1983 | Later Poems 1972-83 | Macmillan, London | Sarn y Plas | This book also includes new poems. |
| 1985 | Ingrowing Thoughts | Poetry Wales Press, Bridgend | Sarn y Plas | - |
| 1986 | Experimenting with an Amen | Macmillan, London | Sarn y Plas | - |
| 1987 | Welsh Airs | Seren Books | Sarn y Plas | This book includes collected Poems about Wales from his earlier books. |
| 1988 | The Echoes Return Slow | Macmillan, London | Sarn y Plas | Collection of poems with his autobiographical essays. |
| 1990 | Counterpoint | Bloodaxe Books, Newcastle upon Tyne | Sarn y Plas | This contains 4 sections--B.C., Incarnation, Crucifixion and A.D.-- but each poem has no title. |
| 1992 | Mass for Hard Times | Bloodaxe Books, Newcastle upon Tyne | Llanfairynghornwy | This book includes "A Marriage," a sad poem devoted to his first wife who died in 1991. |
| 1993 | Collected Poems 1945-1990 | J.M.Dent, London | Llanfairynghornwy | Published to mark his 80th birthday, this book contains more than 500 poems selected from his first book to Mass for Hard Times. |
| 1993 | Frieze | Babel (Ammerse, Germany) | Llanfairynghornwy | - |
| 1995 | No Truce with Furies | Bloodaxe Books, Newcastle upon Tyne | Llanfairynghornwy | - |
| 1996 | Love Poems | Phoenix Paperback, London | Llanfairynghornwy | This book is a collection of love poems written by R.S.Thomas. |
| 1996 | Everyman's Poetry: R.S.Thomas | J.M.Dent, London | Llanfairynghornwy | Selected and Edited by Anthony Thwaite with introduction. |
| 1998 | Betwenn Sea & Sky --Images of Bardsey | Gomer Press, Ceredigion | Llanfairynghornwy | This book contains Peter Hope Jones's photography of Bardsey and quatations from R.S.Thomas's poetry. |
| 2002 | Residues | Bloodaxe Book, Newcastle upon Tyne | - | Published posthumously and edited by M. Wynn Thomas of CREW. |
| 2013 | R.S. Thomas Uncollected Poems | Bloodaxe Book, Newcastle upon Tyne | - | Published to celebrate the centenary of the birth of R.S.Thomas. Edited by Tony Brown & Jason Walford Davies. This long-waited, extraordinary collection covers poetry from 1939 to 2000 and is a MUST-HAVE. |
| 2013 | R.S.THOMAS - Poems to Elsi | Seren | - | Published to mark the centenary of R.S.Thomas's birth. This collection is consist of RST's poems dedicated to his first wife, Mildred E. Eldridge. Edited by Damian Walford Davies. Foreword by Rowan Williams. |
| | | | |
| | | | |