| Election Name: | 1920 Ashton-under-Lyne by-election |
| Type: | presidential |
| Country: | United Kingdom |
| Previous Election: | Ashton-under-Lyne (UK Parliament constituency)#Elections in the 1910s |
| Previous Year: | 1918 |
| Next Election: | Ashton-under-Lyne (UK Parliament constituency)#Elections in the 1920s |
| Next Year: | 1922 |
| Election Date: | 31 January 1920 |
| Candidate1: | de Frece |
| Party1: | Unionist Party (UK) |
| Popular Vote1: | 8,864 |
| Percentage1: | 43.3% |
| Candidate2: | Robinson |
| Party2: | Labour Party (UK) |
| Popular Vote2: | 8,127 |
| Percentage2: | 39.6% |
| Candidate3: | Marshall |
| Party3: | Liberal Party (UK) |
| Popular Vote3: | 3,511 |
| Percentage3: | 17.1% |
| Map Size: | 250px |
| MP | |
| Posttitle: | Subsequent MP |
| Before Election: | Stanley |
| Before Party: | Unionist Party (UK) |
| After Election: | de Frece |
| After Party: | Unionist Party (UK) |
The 1920 Ashton-under-Lyne by-election was a by-election held on 31 January 1920 for the British House of Commons constituency of Ashton-under-Lyne.
The by-election was triggered by the elevation to the peerage of the town's Conservative Party Member of Parliament (MP) Albert Stanley, who was ennobled as Baron Ashfield.
The result was a victory for the Conservative candidate Sir Walter de Frece, who held the seat with a massively reduced majority.
British Pathe has a newsreel clip of Sir Walter de Frece campaigning in the by-election with his wife Vesta Tilley.[1]