Election results for the Hamworthy East by-election, which was held on 24 September 2026.
The elected candidate was:
- Peter Cooper
In total, there were:
- 1140 ballot papers issued
- 5058 electorate
- a turnout of 22.54%
| Candidate name | Description (if any) | Number of votes |
| CHAPMAN Jude | Liberal Democrats | 29 |
| CLEWES Yasmin Marie | The Green Party | 37 |
| COOPER Peter | Labour Party | 476 Elected |
| FIELDEN Louise Christine | Independent | 6 |
| SHELDON John | Reform UK | 453 |
| WHITLOCK Paul | Poole People - independent and local | 135 |
Rejected ballot papers
| Reason ballot paper was rejected: | Number of ballot papers: |
| A) Want of an official mark | 0 |
| B) Voting for more candidates than voter was entitled to | 1 |
| C) Writing or mark by which voter could be identified | 0 |
| D) Being unmarked or wholly void for uncertainty | 3 |
| Total | 4 |
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