| Election Name: | 1921 Taunton by-election |
| Type: | presidential |
| Country: | United Kingdom |
| Previous Election: | Taunton (UK Parliament constituency)#Elections in the 1910s |
| Previous Year: | 1918 |
| Next Election: | Taunton (UK Parliament constituency)#Elections in the 1920s |
| Next Year: | 1922 |
| Election Date: | 8 April 1921 |
| Candidate1: | Griffith-Boscawen |
| Party1: | Unionist Party (UK) |
| Popular Vote1: | 12,994 |
| Percentage1: | 61.1% |
| Candidate2: | Lunnon |
| Party2: | Labour Party (UK) |
| Popular Vote2: | 8,290 |
| Percentage2: | 38.9% |
| Map Size: | 250px |
| MP | |
| Posttitle: | Subsequent MP |
| Before Election: | Boles |
| Before Party: | Unionist Party (UK) |
| After Election: | Simpson |
| After Party: | Liberal Party (UK) |
The 1921 Taunton by-election was held on 8 April 1921. The by-election was held due to the resignation of the incumbent Coalition Unionist MP, Dennis Fortescue Boles. It was won by the Coalition Unionist candidate Arthur Griffith-Boscawen.