| Election Name: | 1908 Dewsbury by-election |
| Type: | presidential |
| Country: | United Kingdom |
| Previous Election: | Dewsbury (UK Parliament constituency)#Elections in the 1900s |
| Previous Year: | 1906 |
| Next Election: | Dewsbury (UK Parliament constituency)#Elections in the 1910s |
| Next Year: | Jan. 1910 |
| Election Date: | 23 April 1908 |
| Candidate1: | Runciman |
| Party1: | Liberal Party (UK) |
| Popular Vote1: | 5,594 |
| Percentage1: | 46.1% |
| Candidate2: | Carpenter |
| Party2: | Conservative Party (UK) |
| Popular Vote2: | 4,078 |
| Percentage2: | 33.7% |
| Candidate3: | Turner |
| Party3: | Labour Party (UK) |
| Popular Vote3: | 2,446 |
| Percentage3: | 20.2% |
| Map Size: | 250px |
| MP | |
| Posttitle: | Subsequent MP |
| Before Election: | Walter Runciman |
| Before Party: | Liberal Party (UK) |
| After Election: | Walter Runciman |
| After Party: | Liberal Party (UK) |
The 1908 Dewsbury by-election was held on 23 April 1908. The by-election was held due to the incumbent Liberal MP, Walter Runciman being appointed President of the Board of Education. It was retained by Runciman.