| Name | Party | Ward | End of Term |
|---|
| DE VET Linda M | Labour Party | Aberaman North | 06-05-2021 |
| EVANS. Sheryl | Labour Party | Aberaman North | 06-05-2021 |
| CALVERT Anita | Labour Party | Aberaman South | 06-05-2021 |
| WILLIAMS Tina | Labour Party | Aberaman South | 06-05-2021 |
| GEORGE Elaine | Labour Party | Abercynon | 06-05-2021 |
| LEWIS Rhys | Labour Party | Abercynon | 06-05-2021 |
| BRADWICK Steven A | Labour Party | Aberdare East | 06-05-2021 |
| FOREY Michael | Labour Party | Aberdare East | 06-05-2021 |
| CRIMMINGS Ann | Labour Party | Aberdare West/Llwydcoed | 06-05-2021 |
| JONES Gareth | Labour Party | Aberdare West/Llwydcoed | 06-05-2021 |
| REES Sharon | Labour Party | Aberdare West/Llwydcoed | 06-05-2021 |
| YEO Richard | Labour Party | Beddau | 06-05-2021 |
| TURNER Roger K | Labour Party | Brynna | 06-05-2021 |
| STACEY Graham | Labour Party | Church Village | 06-05-2021 |
| BELZAK Stephen | Independent / Other | Cilfynydd | 06-05-2021 |
| NORRIS Mark A | Labour Party | Cwm Clydach | 06-05-2021 |
| ELLIOTT Jeffrey | Labour Party | Cwmbach | 06-05-2021 |
| CAPLE. Gareth | Labour Party | Cymmer | 06-05-2021 |
| TEGG Margaret | Labour Party | Cymmer | 06-05-2021 |
| HOWE Philip | Independent / Other | Ferndale | 06-05-2021 |
| MORGANS Susan | Labour Party | Ferndale | 06-05-2021 |
| ROBERTS Aurfron | Labour Party | Gilfach Goch | 06-05-2021 |
| WILLIAMS Doug H | Labour Party | Glyncoch | 06-05-2021 |
| BRENCHER Jayne | Labour Party | Graig | 06-05-2021 |
| Vacancy | Vacant | Hawthorn | 06-05-2021 |
| MORGAN Karen | Plaid Cymru - The Party of Wales | Hirwaun | 06-05-2021 |
| HOPKINS Geraint E | Labour Party | Llanharan | 06-05-2021 |
| OWEN Wayne | Independent / Other | Llanharry | 06-05-2021 |
| HOLMES Glynne | Labour Party | Llantrisant Town | 06-05-2021 |
| DIAMOND Mike | Conservative and Unionist | Llantwit Fardre | 06-05-2021 |
| JAMES Joel S | Conservative and Unionist | Llantwit Fardre | 06-05-2021 |
| LEWIS Wendy | Labour Party | Llwyn-y-pia | 06-05-2021 |
| HARRIES Jack | Labour Party | Maerdy | 06-05-2021 |
| JARMAN Pauline | Plaid Cymru - The Party of Wales | Mountain Ash East | 06-05-2021 |
| MORGAN Andrew | Labour Party | Mountain Ash West | 06-05-2021 |
| TREEBY Wendy | Labour Party | Mountain Ash West | 06-05-2021 |
| CULLWICK John Lewis | Plaid Cymru - The Party of Wales | Pen-y-graig | 06-05-2021 |
| DAVIES Joshua Rhys | Plaid Cymru - The Party of Wales | Pen-y-graig | 06-05-2021 |
| BOGGIS Helen | Labour Party | Pen-y-waun | 06-05-2021 |
| FOX Adam S | Labour Party | Penrhiwceiber | 06-05-2021 |
| WILLIAMS Gavin David Gwilym | The Cynon Valley Party | Penrhiwceiber | 06-05-2021 |
| REES-OWEN Shelley | Plaid Cymru - The Party of Wales | Pentre | 06-05-2021 |
| WEAVER Maureen | Plaid Cymru - The Party of Wales | Pentre | 06-05-2021 |
| JONES Kate Libby | Independent / Other | Pont-y-clun | 06-05-2021 |
| GRIFFITHS Margaret | Labour Party | Pont-y-clun | 06-05-2021 |
| FYCHAN Heledd | Plaid Cymru - The Party of Wales | Pontypridd Town | 06-05-2021 |
| COX Alun Geraint | Plaid Cymru - The Party of Wales | Porth | 06-05-2021 |
| WILLIAMS Julie | Plaid Cymru - The Party of Wales | Porth | 06-05-2021 |
| THOMAS Graham Philip | Labour Party | Rhigos | 06-05-2021 |
| LEYSHON Christina | Labour Party | Rhondda | 06-05-2021 |
| GRIFFITHS Eleri Megan | Plaid Cymru - The Party of Wales | Rhondda | 06-05-2021 |
| WEBBER Maureen | Labour Party | Rhydfelen Central/Ilan | 06-05-2021 |
| BONETTO Jill | Labour Party | Taffs Well | 06-05-2021 |
| POWELL Stephen Mark | Labour Party | Talbot Green | 06-05-2021 |
| HOOPER Lewis | Conservative and Unionist | Ton-teg | 06-05-2021 |
| WALKER Lyndon | Independent / Other | Ton-teg | 06-05-2021 |
| HUGHES Gareth Wyn | Labour Party | Tonypandy | 06-05-2021 |
| OWEN-JONES Dan | Labour Party | Tonyrefail East | 06-05-2021 |
| GREHAN Danny | Plaid Cymru - The Party of Wales | Tonyrefail East | 06-05-2021 |
| DAVIES-JONES Alexandra | Labour Party | Tonyrefail West | 06-05-2021 |
| POWELL Michael J | Independent / Other | Trallwng | 06-05-2021 |
| ROSSER Joy | Labour Party | Trealaw | 06-05-2021 |
| POWDERHILL Steve | Labour Party | Treforest | 06-05-2021 |
| DAVIES Geraint R | Plaid Cymru - The Party of Wales | Treherbert | 06-05-2021 |
| JONES Will | Independent / Other | Treherbert | 06-05-2021 |
| CHAPMAN Alison | Plaid Cymru - The Party of Wales | Treorchy | 06-05-2021 |
| EVANS Sêra M | Plaid Cymru - The Party of Wales | Treorchy | 06-05-2021 |
| WEBSTER Emyr John | Plaid Cymru - The Party of Wales | Treorchy | 06-05-2021 |
| ADAMS Mark | Labour Party | Tylorstown | 06-05-2021 |
| BEVAN Robert | Labour Party | Tylorstown | 06-05-2021 |
| WILLIS Clayton J | Labour Party | Tyn-y-nant | 06-05-2021 |
| EDWARDS Julie | Labour Party | Ynyshir | 06-05-2021 |
| PICKERING Sue | Labour Party | Ynysybwl | 06-05-2021 |
| JONES Larraine | Plaid Cymru - The Party of Wales | Ystrad | 06-05-2021 |
| STEPHENS Elyn | Plaid Cymru - The Party of Wales | Ystrad | 06-05-2021 |