The club runs internal leagues on a six week cycle (subject to tournament dates). They cater for all standards, but please note that only members can join the leagues. Currently there are 9 leagues of 5 players. If you are thinking about joining and would like a bit more information please email our league organiser Russell Cooper on horshamsquashleagues@gmail.com
| Day | Date | Team | Opposition |
| Sept | |||
| Fri | 11/09/2026 | Horsham 5 | Lewes 4 |
| Tue | 15/09/2026 | Horsham 3 | Brighton 3 |
| Fri | 18/09/2026 | Horsham 1 | Dolphin 1 |
| Tue | 22/09/2026 | Horsham 2 | Dolphin 2 |
| Tue | 29/09/2026 | Horsham 5 | Brighton 4 |
| Oct | |||
| Fri | 09/10/2026 | Horsham 1 | Weald 1 |
| Tue | 13/10/2026 | Horsham 3 | Burgess Hill 2 |
| Mon | 19/10/2026 | Horsham 5 | Dunnings – Acorns 5 |
| Fri | 23/10/2026 | Horsham 2 | Weald 2 |
| Fri | 30/10/2026 | Horsham 3 | Dunnings – Acorns 3 |
| Nov | |||
| Fri | 20/11/2026 | Horsham 1 | Middleton 1 |
| Tue | 24/11/2026 | Horsham 5 | Nutley 2 |
| Dec | |||
| Fri | 04/12/2026 | Horsham 4 | Chichester R & FC 4 |
| Tue | 08/12/2026 | Horsham 2 | East Grinstead 1 |
| Fri | 11/12/2026 | Horsham 1 | Chichester R & FC 1 |
| Jan | |||
| Fri | 08/01/2027 | Horsham 4 | The West Worthing Club 3 |
| Fri | 15/01/2027 | Horsham 2 | Brighton 2 |
| Fri | 29/01/2027 | Horsham 1 | Midhurst 1 |
| Feb | |||
| Mon | 01/02/2027 | Horsham 5 | Dolphin 5 |
| Tue | 02/02/2027 | Horsham 3 | East Grinstead 2 |
| Fri | 05/02/2027 | Horsham 2 | Dunnings – Acorns 2 |
| Tue | 09/02/2027 | Horsham 4 | Littlehampton 2 |
| Fri | 19/02/2027 | Horsham 1 | Crawley Squash 1 |
| Tue | 23/02/2027 | Horsham 3 | Crowborough 1 |
| Mar | |||
| Fri | 05/03/2027 | Horsham 5 | Weald 8 |
| Fri | 12/03/2027 | Horsham 4 | Bluecoat Sports Horsham 2 |
| Tue | 16/03/2027 | Horsham 3 | Weald 4 |
| Apr | |||
| Fri | 02/04/2027 | Horsham 1 | Dunnings – Acorns 1 |
| Mon | 05/04/2027 | Horsham 5 | East Grinstead 4 |
| Fri | 16/04/2027 | Horsham 4 | Middleton 4 |
| Fri | 23/04/2027 | Horsham 2 | Lewes 1 |
| Fri | 30/04/2027 | Horsham 1 | Brighton 1 |
