| Cardiff South and Penarth LAB HOLD |
| Candidate | Party | Votes | % | +- |
| Alun Michael | Labour | 17447 | 47.3 | -8.9 |
| Victoria Green | Conservative | 8210 | 22.2 | +0.4 |
| Gavin Cox | Liberal Democrat | 7529 | 20.4 | +7.6 |
| Jason Toby | Plaid Cymru | 2023 | 5.5 | 0.0 |
| John Matthews | Green | 729 | 2.0 | +2.0 |
| Jennie Tuttle | UK Independence Party | 522 | 1.4 | 0.0 |
| David Bartlett | Socialist Alternative | 269 | 0.7 | +0.7 |
| Andrew Taylor | Independent | 104 | 0.3 | +0.3 |
| Catherine Taylor-Dawson | Vote for Yourself Rainbow Dream Ticket | 79 | 0.2 | +0.2 |
| Majority | 9237 | 25.0 |
| Turnout | 36912 | 56.2 | -0.9 |
Prepared and maintained by Todor Krastev
todor1966@yahoo.com
Last updated: 9 May 2005