The 1920 Ebbw Vale by-election was held on 26 July 1920. The by-election was held due to the resignation of the incumbent Labour MP, Thomas Richards. The Labour candidate Evan Davies [1] was unopposed and declared as the victor.
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| Labour | Evan Davies | Unopposed | |||
| Registered electors | |||||
| Labour hold | |||||