Results for the Upminster by-election, Thursday 10 August 2023.
| Candidate | Commonly known as | Party | Total votes |
|---|---|---|---|
| Thomas Patrick Clark | Liberal Democrats | 35 | |
| Melanie Jane Collins | Green Party | 115 | |
| David Warren Durant | Independent | 150 | |
| Edward Andrew Green | Conservatives | 421 | |
| John Gregory Sullivan | Labour Party | 234 | |
| Jacqueline Ann Williams | Upminster and Cranham Residents Association | 1,642 |
- Number of ballot papers fully rejected:
- A. No official mark: 1
- B. Voting for more candidates than is permitted: 2
- C. Void for uncertainty: 5
- D. Voter identified: 0
- Total votes rejected: 8
- Partially rejected votes: TBC
- Turnout: 25.47 percent
Councillor Jacqueline Williams is duly elected to represent Upminster ward.