| Name | Party | Ward | End of Term |
|---|
| Colin Matthews | Conservative and Unionist Party | Alford and Sutton | 06-05-2021 |
| Ian Gordon Fleetwood | Conservative and Unionist Party | Bardney and Cherry Willingham | 06-05-2021 |
| Mrs Marianne Jane Overton MBE | Lincolnshire Independents Lincolnshire First | Bassingham and Welbourn | 06-05-2021 |
| Edmund Walter Strengiel | Conservative and Unionist Party | Birchwood | 06-05-2021 |
| Paul Anthony Skinner | Conservative and Unionist Party | Boston Coastal | 06-05-2021 |
| Aaron Jacob Spencer | Conservative and Unionist Party | Boston North | 06-05-2021 |
| Michael Brookes | Conservative and Unionist Party | Boston Rural | 06-05-2021 |
| Mrs Alison Mary Austin | Independent / Other | Boston South | 06-05-2021 |
| Mrs Paula Cooper | Conservative and Unionist Party | Boston West | 06-05-2021 |
| Kevin John Clarke | Labour Party | Boultham | 06-05-2021 |
| Mrs Susan Woolley | Conservative and Unionist Party | Bourne North and Morton | 06-05-2021 |
| Robert Philip Harry Reid | Conservative and Unionist Party | Bourne South and Thurlby | 06-05-2021 |
| Robert Bernard Parker | Labour Party | Carholme | 06-05-2021 |
| Bob Adams | Conservative and Unionist Party | Colsterworth Rural | 06-05-2021 |
| Nigel Harry Pepper | Conservative and Unionist Party | Crowland | 06-05-2021 |
| Barry Martin Dobson | Conservative and Unionist Party | Deepings East | 06-05-2021 |
| Rosemary Helen Trollope-Bellew | Conservative and Unionist Party | Deepings West and Rural | 06-05-2021 |
| Rodney Grocock | Conservative and Unionist Party | Donington Rural | 06-05-2021 |
| Dr Michael Ernest Thompson | Conservative and Unionist Party | Eagle and Hykeham West | 06-05-2021 |
| Christopher Edward Reid | Conservative and Unionist Party | Ermine and Cathedral | 06-05-2021 |
| Martin John Hill OBE | Conservative and Unionist Party | Folkingham Rural | 06-05-2021 |
| Matthew David Boles | Liberal Democrats | Gainsborough Hill | 06-05-2021 |
| Richard David Butroid | Conservative and Unionist Party | Gainsborough Rural South | 06-05-2021 |
| Paul Michael Key | Independent / Other | Gainsborough Trent | 06-05-2021 |
| Mark Anthony Whittington | Conservative and Unionist Party | Grantham Barrowby | 06-05-2021 |
| Linda Wootten | Conservative and Unionist Party | Grantham East | 06-05-2021 |
| Ray Wootten | Conservative and Unionist Party | Grantham North | 06-05-2021 |
| Adam Neil Stokes | Conservative and Unionist Party | Grantham South | 06-05-2021 |
| Richard Graham Davies | Conservative and Unionist Party | Grantham West | 06-05-2021 |
| Matthew Thomas Fido | Conservative and Unionist Party | Hartsholme | 06-05-2021 |
| Barry Young | Conservative and Unionist Party | Heckington | 06-05-2021 |
| Charles Nicholas Worth | Conservative and Unionist Party | Holbeach | 06-05-2021 |
| Peter Ephraim Coupland | Conservative and Unionist Party | Holbeach Rural | 06-05-2021 |
| William James Aron | Conservative and Unionist Party | Horncastle and The Keals | 06-05-2021 |
| Alexander Paul Maughan | Conservative and Unionist Party | Hough | 06-05-2021 |
| Stephen Peter Roe | Conservative and Unionist Party | Hykeham Forum | 06-05-2021 |
| Colin John Davie | Conservative and Unionist Party | Ingoldmells Rural | 06-05-2021 |
| Tony Bridges | Conservative and Unionist Party | Louth North | 06-05-2021 |
| Sarah Rosemary Parkin | Labour Party | Louth South | 06-05-2021 |
| Charles Edward Hugo Marfleet | Conservative and Unionist Party | Louth Wolds | 06-05-2021 |
| Graham Edward Cullen | Labour Party | Mablethorpe | 06-05-2021 |
| Charles Lewis Strange | Conservative and Unionist Party | Market Rasen Wolds | 06-05-2021 |
| Robert Jozef Kendrick | Conservative and Unionist Party | Metheringham Rural | 06-05-2021 |
| Mrs Jacqueline Brockway | Conservative and Unionist Party | Nettleham and Saxilby | 06-05-2021 |
| Anthony Herbert Turner MBE JP | Conservative and Unionist Party | North Wolds | 06-05-2021 |
| Mrs Julie Elizabeth Killey | Labour Party | Park | 06-05-2021 |
| Clive Ronald Oxby | Conservative and Unionist Party | Potterhanworth and Coleby | 06-05-2021 |
| Mark John Storer | Conservative and Unionist Party | Ruskington | 06-05-2021 |
| Daniel McNally | Conservative and Unionist Party | Saltfleet and the Cotes | 06-05-2021 |
| Clio Lyndon Perraton-Williams | Conservative and Unionist Party | Scotter Rural | 06-05-2021 |
| Carl Stuart Macey | Conservative and Unionist Party | Skegness North | 06-05-2021 |
| Stephen Russell Kirk | Conservative and Unionist Party | Skegness South | 06-05-2021 |
| Martin Alexander Griggs | Conservative and Unionist Party | Skirbeck | 06-05-2021 |
| Mrs Kathryn Cook | Independent / Other | Sleaford | 06-05-2021 |
| Andrew Gibson Hagues | Conservative and Unionist Party | Sleaford Rural | 06-05-2021 |
| Edward John Poll | Conservative and Unionist Party | Spalding East | 06-05-2021 |
| Mrs Elizabeth Jane Sneath | Conservative and Unionist Party | Spalding Elloe | 06-05-2021 |
| Mrs Christine Jane Lawton | Conservative and Unionist Party | Spalding South | 06-05-2021 |
| Mrs Angela Mary Newton | Independent / Other | Spalding West | 06-05-2021 |
| Robin Anthony Renshaw | Labour Party | St Giles | 06-05-2021 |
| Robert Lloyd Foulkes | Independent / Other | Stamford East | 06-05-2021 |
| David Brailsford | Conservative and Unionist Party | Stamford West | 06-05-2021 |
| Hilton Spratt | Conservative and Unionist Party | Swallow Beck and Witham | 06-05-2021 |
| Thomas Robert Ashton | Conservative and Unionist Party | Tattershall Castle | 06-05-2021 |
| Christopher James Thomas Harrison Brewis | Independent / Other | The Suttons | 06-05-2021 |
| Mrs Christine Anne Talbot | Conservative and Unionist Party | Waddington and Hykeham East | 06-05-2021 |
| Mrs Wendy Bowkett | Conservative and Unionist Party | Wainfleet | 06-05-2021 |
| Lindsey Ann Cawrey | Conservative and Unionist Party | Washingborough | 06-05-2021 |
| Mrs Susan Rawlins | Conservative and Unionist Party | Welton Rural | 06-05-2021 |
| Mrs Patricia Anne Bradwell OBE | Conservative and Unionist Party | Woodhall Spa and Wragby | 06-05-2021 |