Llanelli is currently held by the Labour Party, and awaits results.
Results for 2019 are notional estimates based on the new boundaries.
| Votes | Share % | Change %pts. | ||
|---|---|---|---|---|
| Gareth Beer Reform UK | − | − | − | |
| Rhodri Davies Plaid Cymru | − | − | − | |
| Charlie Evans Conservative | − | − | − | |
| Nia Griffith Labour | − | − | − | |
| Karen Laurence Green | − | − | − | |
| Chris Passmore Liberal Democrat | − | − | − | |
| Stan Robinson UK Independence Party | − | − | − |