An election to the 58th Parliament of the United Kingdom for the constituency area of Dwyfor Meirionnydd, held as part of the general election on 12 December 2019.
Plaid Cymru hold by Liz Saville Roberts with a majority of 4,740 - 15.8% - on a turnout of 67.5%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| SAVILLE ROBERTS, Liz | PC | 14,447 | 48.3% | 3.2% |
| DAVIES, Tomos | Con | 9,707 | 32.4% | 3.3% |
| HOGG, Graham | Lab | 3,998 | 13.4% | -7.3% |
| HUGHES, Louise | BRX | 1,776 | 5.9% | - |
Under section 13(b) of the Representation of the People Act 1985, a candidate gaining 5% or less of the vote share will forfeit their deposit.
An electorate of 44,362, having a valid vote count of 29,928 and an invalid vote count of 128.
Result declared at 02:22 on 13 December 2019.