The results of the by-election held in the Highfield ward on Thursday 6 May 2021 are as follows:
Highfield Ward by election 2021 results
| Name of candidate | Description (if any) | Number of votes | Percentage of votes |
| Becky Daniels |
Green Party |
55 |
3.07 |
| Bill Greene |
Liberal Democrats |
22 |
1.23 |
| Kim Sherrie Knight |
Reform UK |
40 |
2.24 |
| Bradley Curtis Mitchell |
Conservative Party Candidate |
982 |
54.89 |
| Christine Elizabeth Wright |
Labour Party Candidate |
498 |
27.84 |
| Rob Wynne |
Independent |
192 |
10.73 |

Rejected ballot paper statement
The number of ballot papers rejected is as follows:
- Want of an official mark -0
- Voting for more candidates than voter was entitled to -0
- Writing or mark by which the voter could be identified -0
- Being unmarked or wholly void for uncertainty -1
- Total - 1
Turnout
- Electorate -4811
- Verified ballot papers -1790
-
Turnout -37.21%