| Election Name: | 1937 Plymouth Drake by-election |
| Type: | parliamentary |
| Country: | United Kingdom |
| Seats For Election: | Constituency of Plymouth Drake |
| Ongoing: | no |
| Previous Election: | 1935 United Kingdom general election |
| Previous Year: | 1935 |
| Next Election: | 1945 United Kingdom general election |
| Next Year: | 1945 |
| Election Date: | 15 June 1937 |
| Candidate1: | Henry Guest |
| Party1: | Conservative Party (UK) |
| Popular Vote1: | 15,778 |
| Percentage1: | 58.82% |
| Candidate2: | Geoffrey Garratt |
| Party2: | Labour Party (UK) |
| Popular Vote2: | 11,044 |
| Percentage2: | 41.18% |
| MP | |
| Before Election: | Frederick Guest |
| Before Party: | Conservative Party (UK) |
| After Election: | Henry Guest |
| After Party: | Conservative Party (UK) |
The 1937 Plymouth Drake by-election was held on 15 June 1937. The by-election was held due to the death of the incumbent Conservative MP, Frederick Guest. It was won by the Conservative candidate Henry Guest, an elder brother of Frederick.