| Party | Name | Ward | End of Term | Byelection |
|---|
| CON | Edward Drewe | Ammerdown | 02-05-2019 | - |
| CON | John Carter | Ashwick, Chilcompton and Stratton | 02-05-2019 | - |
| CON | Rachel Carter | Ashwick, Chilcompton and Stratton | 02-05-2019 | - |
| CON | Clive Mockford | Beckington and Selwood | 02-05-2019 | - |
| CON | Nigel Woollcombe-Adams | Butleigh and Baltonsborough | 02-05-2019 | - |
| CON | Tom Killen | Chewton Mendip and Ston Easton | 02-05-2019 | - |
| CON | Philip Ham | Coleford and Holcombe | 02-05-2019 | - |
| CON | Alan Townsend | Coleford and Holcombe | 02-05-2019 | - |
| CON | David van Dyk | Cranmore, Doulting and Nunney | 02-05-2019 | - |
| CON | Peter Bradshaw | Creech | 02-05-2019 | - |
| CON | Nigel Hewitt-Cooper | Croscombe and Pilton | 02-05-2019 | - |
| CON | Joanna Beale | Frome Berkley Down | 02-05-2019 | - |
| CON | Eve Berry | Frome Berkley Down | 02-05-2019 | - |
| CON | Carole Bullen | Frome College | 02-05-2019 | - |
| LD | Adam Boyden | Frome College | 02-05-2019 | - |
| GRN | Shane Collins | Frome Keyford | 02-05-2019 | - |
| LD | Alvin Horsfall | Frome Keyford | 02-05-2019 | - |
| GRN | Des Harris | Frome Market | 02-05-2019 | - |
| GRN | Stina Falle | Frome Market | 02-05-2019 | - |
| IND | Helen Sprawson-White | Frome Oakfield | 02-05-2019 | - |
| LD | Claire Hudson | Frome Park | 02-05-2019 | - |
| LD | Damon Hooton | Frome Park | 02-05-2019 | - |
| CON | Steve Henderson | Glastonbury St Benedict's | 02-05-2019 | - |
| LD | Nick Cottle | Glastonbury St Edmund's | 02-05-2019 | - |
| CON | John Coles | Glastonbury St John's | 02-05-2019 | - |
| CON | John Brunsdon MBE | Glastonbury St Mary's | 02-05-2019 | - |
| CON | Graham Noel | Moor | 02-05-2019 | - |
| CON | Dick Skidmore | Postlebury | 02-05-2019 | - |
| CON | Linda Oliver | Rode and Norton St Philip | 02-05-2019 | - |
| LD | Ros Wyke | Rodney and Westbury | 02-05-2019 | - |
| CON | Jeannette Marsh | Shepton East | 02-05-2019 | - |
| IND | Bente Height | Shepton East | 02-05-2019 | - |
| CON | John Parham | Shepton West | 02-05-2019 | - |
| CON | Simon Davies | Shepton West | 02-05-2019 | - |
| CON | Mike Pullin | St Cuthbert Out North | 02-05-2019 | - |
| LD | Adam Sen | Street North | 02-05-2019 | - |
| CON | Timothy Rice | Street North | 02-05-2019 | - |
| LD | Bryan Beha | Street South | 02-05-2019 | - |
| IND | Lloyd Hughes | Street South | 02-05-2019 | - |
| CON | Terry Napper | Street West | 02-05-2019 | - |
| CON | John Greenhalgh | The Pennards and Ditcheat | 02-05-2019 | - |
| CON | John North | Wells Central | 02-05-2019 | - |
| CON | John Osman | Wells St Cuthbert's | 02-05-2019 | - |
| CON | Harvey Siggs | Wells St Cuthbert's | 02-05-2019 | - |
| LD | Roy Mackenzie | Wells St Thomas' | 02-05-2019 | - |
| LD | Tom Ronan | Wells St Thomas' | 02-05-2019 | - |
| CON | Nigel Taylor | Wookey and St Cuthbert Out West | 02-05-2019 | - |