An election to the 58th Parliament of the United Kingdom for the constituency area of Caerphilly, held as part of the general election on 12 December 2019.
Labour hold by Wayne David with a majority of 6,833 - 17.0% - on a turnout of 63.5%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| DAVID, Wayne | Lab | 18,018 | 44.9% | -9.5% |
| PRATT, Jane | Con | 11,185 | 27.9% | 2.7% |
| WHITTLE, Lindsay | PC | 6,424 | 16.0% | 1.6% |
| GILL, Nathan | BRX | 4,490 | 11.2% | - |
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 63,166, having a valid vote count of 40,117 and an invalid vote count of 160.
Result declared at 01:42 on 13 December 2019.