| Country: | Great Britain |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1780 Speaker of the British House of Commons election |
| Previous Year: | 1780 |
| Next Election: | June 1789 Speaker of the British House of Commons election |
| Next Year: | 1789 (Jun) |
| Election Date: | 5 January 1789 |
| 1Blank: | Candidate's seat |
| Candidate1: | William Wyndham Grenville |
| 1Data1: | Buckinghamshire |
| Popular Vote1: | 215 |
| Percentage1: | 59.9% |
| Candidate2: | Sir Gilbert Elliot |
| 1Data2: | Berwick |
| Popular Vote2: | 144 |
| Percentage2: | 40.1% |
| Speaker | |
| Before Election: | Charles Wolfran Cornwall |
| After Election: | William Wyndham Grenville |
The January 1789 election of the Speaker of the House of Commons occurred on 5 January 1789.
The election followed the death of incumbent Speaker Charles Wolfran Cornwall.
William Wyndham Grenville was nominated by the Earl of Euston and seconded by William Pulteney.
Sir Gilbert Elliot was nominated by Welbore Ellis and seconded by Frederick Montagu.
Both candidates addressed the House.
On the motion "That the Right Honourable William Wyndham Grenville do take the chair of this House as Speaker," Grenville was elected by 215 votes to 144.