| Reserve Division One | |||
| 25/08/1999 | Brackenhall Utd | 3 - 1 | Slaithwaite Utd |
| 01/09/1999 | Slaithwaite Utd | 2 - 1 | Uppermill Res |
| 04/09/1999 | Slaithwaite Utd | 3 - 2 | Shelley |
| 11/09/1999 | Britannia Sports | 2 - 4 | Slaithwaite Utd |
| 18/09/1999 | Slaithwaite Utd | 4 - 2 | Lindley Liberal |
| 25/09/1999 | Honley | 1 - 0 | Slaithwaite Utd |
| 02/10/1999 | Slaithwaite Utd | 3 - 5 | Diggle |
| 09/10/1999 | Berry Brow Lib | 1 - 5 | Slaithwaite Utd |
| FA Junior Cup Round One | |||
| 16/10/1999 | Mount | 0 - 8 | Slaithwaite Utd |
| 23/10/1999 | Slaithwaite Utd | 4 - 1 | Kirkburton |
| 30/10/1999 | Slaithwaite Utd | 3 - 2 | Heywood Sports |
| 06/11/1999 | Almondbury Utd | 1 - 0 | Slaithwaite Utd |
| 13/11/1999 | Slaithwaite Utd | 2 - 3 | Shepley |
| FA Junior Cup Round Two | |||
| 20/11/1999 | Slaithwaite Utd | 2 - 1 | Cumberworth |
| 27/11/1999 | Slaithwaite Utd | 5 - 2 | Kirkheaton Rovers |
| Richardson Cup Round One | |||
| 08/01/2000 | Kirkheaton Rovers 'A' | 4 - 3 | Slaithwaite Utd |
| FA Junior Cup Round Three Quarter Finals | |||
| 15/01/2000 | Slaithwaite Utd | 1 - 1 | Skelmanthorpe |
| 22/01/2000 | Slaithwaite Utd | 0 - 1 | Brackenhall Utd |
| 19/02/2000 | Lindley Liberal | 2 - 0 | Slaithwaite Utd |
| FA Junior Cup Round Three Quarter Finals | |||
| 26/02/2000 | Skelmanthorpe | 2 - 0 | Slaithwaite Utd |
| 11/03/2000 | Slaithwaite Utd | 3 - 0 | Honley |
| 18/03/2000 | Kirkburton | 4 - 0 | Slaithwaite Utd |
| 25/03/2000 | Kirkheaton Rovers | 3 - 4 | Slaithwaite Utd |
| 01/04/2000 | Heywood Sports | 2 - 0 | Slaithwaite Utd |
| 08/04/2000 | Shepley | 7 - 0 | Slaithwaite Utd |
| 11/04/2000 | Shelley | 0 - 0 | Slaithwaite Utd |
| 15/04/2000 | Slaithwaite Utd | 3 - 1 | Britannia Sports |
| 18/04/2000 | Uppermill Res | 5 - 2 | Slaithwaite Utd |
| 20/04/2000 | Diggle | P - P | Slaithwaite Utd |
| 22/04/2000 | Slaithwaite Utd | 7 - 1 | Berry Brow Lib |
| 04/05/2000 | Slaithwaite Utd | 2 - 3 | Almondbury Utd |