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