Cardiff South & Penarth 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. | ||
|---|---|---|---|---|
| Stephen Doughty Labour | − | − | − | |
| Simon Llewellyn Reform UK | − | − | − | |
| Sharifah Rahman Plaid Cymru | − | − | − | |
| Anthony Slaughter Green | − | − | − | |
| Ellis Smith Conservative | − | − | − | |
| Alex Wilson Liberal Democrat | − | − | − |