Before (end of 2020) (30 seats, Open Council Data)
Conservative 15 · Other 13 · Labour 2
After (end of 2021) (30 seats, Open Council Data)
Other 14 · Conservative 14 · Labour 2
Ward results
Boston North2 seats
| A.M. Austin | Independent | 874 ✓ |
| T.A. Abbott | Conservative | 703 |
| P.M.F. Watson | Independent | 263 |
| A. Bell | Labour | 168 |
| S. Ransome | Independent | 97 |
| M. Gilbert | FTPNTP | 36 |
Witham1 seat
| B. Mara | Conservative | 1,133 ✓ |
| Joshua Thomas Hutchins | Labour | 573 |
| A. Parr | Green | 127 |
| Sarah Uldall | Liberal Democrats | 81 |
| Guthrie D.A. | REF | 33 |