The fixtures for the U21/Development squad have been announced for the coming season. Fixtures are subject to date and venue changes (as regular followers will know) so keep an eye on the club's media streams ahead of the matches.
| DATE/TIME | OPPOSITION | H/A | VENUE |
| 17/08/16 (2pm) | Crewe Alexandra | A | Reaseheath Training Ground |
| 22/08/16 (1pm) | LEEDS UNITED | H | Leckwith International |
| 30/08/16 (2pm) | Coventry City | A | Training Ground |
| 05/09/16 (2pm) | COLCHESTER UNITED | H | Leckwith International |
| 12/09/16 (7pm) | Hull City | A | TBC |
| 19/09/16 (2pm) | BIRMINGHAM CITY | H | Leckwith International |
| 23/09/16 (7pm) | Nottingham Forest | A | TBC |
| 10/10/16 (2pm) | BARNSLEY | H | Leckwith International |
| 17/10/16 (2pm) | CHARLTON ATHLETIC | H | Leckwith International |
| 24/10/16 (7pm) | Ipswich Town | A | Portman Road |
| 31/10/16 (7pm) | CRYSTAL PALACE | H | Cardiff City Stadium |
| 14/11/16 (2pm) | Millwall | A | The Den |
| 21/11/16 (7pm) | QUEENS PARK RANGERS | H | Cardiff City Stadium |
| 28/11/16 (2pm) | Watford | A | Watford Training Academy |
| 12/12/16 (1pm) | Bristol City | A | The Academy |
| 19/12/16 (7pm) | COVENTRY CITY | H | Cardiff City Stadium |
| 09/01/17 (1pm) | Charlton Athletic | A | TBC |
| 16/01/17 (7pm) | IPSWICH TOWN | H | Cardiff City Stadium |
| 30/01/17 (2pm) | MILLWALL | H | Leckwith International |
| 06/02/17 (1pm) | Crystal Palace | A | TBC |
| 20/02/17 (1pm) | Queens Park Rangers | A | Imperial Harlington |
| 06/03/17 (7pm) | WATFORD | H | Cardiff City Stadium |
| 13/03/17 (7pm) | Bolton Wanderers | A | TBC |
| 20/03/17 (7pm) | SHEFFIELD UNITED | H | Cardiff City Stadium |
| 27/03/17 (1pm) | Sheffield Wednesday | A | TBC |
| 03/04/17 (7pm) | HUDDERSFIELD TOWN | H | Cardiff City Stadium |
| 10/04/17 (1pm) | Colchester United | A | Colchester Training Ground |
| 24/04/17 (7pm) | BRISTOL CITY | H | Cardiff City Stadium |