Head to Head
| England Championship | 2019/12/26 15:00 | Cardiff v Millwall | D | 1-1 |
| England Championship | 2019/10/22 18:45 | Millwall v Cardiff | D | 2-2 |
| England Championship | 2018/02/09 19:45 | Millwall v Cardiff | D | 1-1 |
| England Championship | 2017/10/28 14:00 | Cardiff v Millwall | D | 0-0 |
| England Championship | 2015/04/18 14:00 | Cardiff v Millwall | D | 0-0 |
| England Championship | 2014/10/25 11:15 | Millwall v Cardiff | L | 1-0 |
Home History
| England Championship | 2020/09/19 11:30 | Nottm Forest v Cardiff | W | 0-2 |
| England Championship | 2020/09/12 14:00 | Cardiff v Sheff Wed | L | 0-2 |
| England EFL Cup | 2020/09/05 14:00 | Northampton v Cardiff | L | 3-0 |
| England Championship | 2020/07/30 18:45 | Fulham v Cardiff | W | 1-2 |
| England Championship | 2020/07/27 18:45 | Cardiff v Fulham | L | 0-2 |
| England Championship | 2020/07/22 18:30 | Cardiff v Hull | W | 3-0 |
| England Championship | 2020/07/18 14:00 | Middlesbrough v Cardiff | W | 1-3 |
| England Championship | 2020/07/14 18:45 | Cardiff v Derby | W | 2-1 |
Away History
| England EFL Cup | 2020/09/23 18:00 | Millwall v Burnley | L | 0-2 |
| England Championship | 2020/09/19 14:00 | Rotherham v Millwall | W | 0-1 |
| England EFL Cup | 2020/09/15 17:00 | Millwall v Cheltenham | W | 3-1 |
| England Championship | 2020/09/12 14:00 | Millwall v Stoke | D | 0-0 |
| England EFL Cup | 2020/09/05 12:00 | Crawley Town v Millwall | W | 1-3 |
| Club Friendly List | 2020/09/01 13:00 | Millwall v Crystal Palace | L | 0-1 |
| England Championship | 2020/07/22 18:30 | Millwall v Huddersfield | W | 4-1 |
| England Championship | 2020/07/18 14:00 | QPR v Millwall | L | 4-3 |