| Election Name: | 1920 Ilford by-election |
| Type: | presidential |
| Country: | United Kingdom |
| Previous Election: | Ilford (UK Parliament constituency)#Elections in the 1910s |
| Previous Year: | 1918 |
| Next Election: | Ilford (UK Parliament constituency)#Elections in the 1920s |
| Next Year: | 1922 |
| Election Date: | 25 September 1920 |
| Candidate1: | Wise |
| Party1: | Unionist Party (UK) |
| Popular Vote1: | 15,612 |
| Percentage1: | 54.38 |
| Candidate2: | King |
| Party2: | Labour Party (UK) |
| Popular Vote2: | 6,577 |
| Percentage2: | 22.91 |
| Candidate3: | Thompson |
| Party3: | Liberal Party (UK) |
| Popular Vote3: | 6,515 |
| Percentage3: | 22.69 |
| Map Size: | 250px |
| MP | |
| Posttitle: | Subsequent MP |
| Before Election: | Griggs |
| Before Party: | Unionist Party (UK) |
| After Election: | Wise |
| After Party: | Unionist Party (UK) |
The Ilford by-election of 25 September 1920 was held after the death of the Coalition Unionist Member of Parliament Sir William Peter Griggs. The Coalition retained the seat in the by-election.
British Pathe has newsreel footage of the three candidates standing outside their election count.http://www.britishpathe.com/video/election-at-ilford/query/election
Wise was re-elected at the following General Election when Thompson again stood, but this time, beat the Labour candidate into third place.