| 14/01 to 14/01 | Red, Orange & Green Ball Leinster Tour part 18 | |
| 04/02 to 15/02 | Red, Orange & Green Ball Leinster Tour part 19TP | |
| 25/02 to 25/02 | Leinster Regional Spring Day Cup | |
| 25/02 to 04/03 | Red, Orange & Green Ball Leinster Tour Part 20 | |
| 05/03 to 21/05 | 2023 Leinster Regional Spring League | |
| 05/03 to 28/05 | 2023 Leinster Tennis Under 12 League | |
| 05/03 to 28/05 | 2023 Leinster Tennis Under 18 League | |
| 10/03 to 25/05 | Leinster Primary Schools League 2023 | |
| 11/03 to 19/03 | Red, Orange & Green Ball Leinster Tour Part 21 | |
| 21/03 to 01/01 | Leinster Branch | » Matches |
| 25/03 to 01/04 | Red, Orange & Green Ball Leinster Tour Part 22 | |
| 11/04 to 15/04 | Red, Orange & Green Ball Leinster Tour Part 23 | |
| 22/04 to 22/04 | Red, Orange & Green Ball Leinster Tour Part 24 | |
| 07/05 to 07/05 | Red, Orange & Green Ball Leinster Tour Part 25 | |
| 28/05 to 28/05 | Red, Orange & Green Ball Leinster Tour Part 26 | |
| 18/06 to 18/06 | Red, Orange & Green Ball Leinster Tour Part 27 | |
| 24/06 to 24/06 | Leinster Regional Summer Day Cup | |
| 03/07 to 10/07 | Leinster Tennis T100 U12 | |
| 07/07 to 28/07 | Red, Orange & Green Ball Leinster Tour Part 28 | |
| 15/07 to 26/08 | 2023 Leinster Tennis U10 league | |
| 17/07 to 24/07 | Leinster Tennis T100 U14 | |
| 04/08 to 05/08 | National Interprovincial Championships 2023 | |
| 27/08 to 27/08 | Leinster Tennis August T100 U12 | |
| 02/09 to 02/09 | Leinster regional Autumn Cup | |
| 22/09 to 23/09 | Masters Interprovincial Championships 2023 | |
| 23/09 to 23/09 | Red, Orange & Green Ball Leinster Tour Part 30 | |
| 07/10 to 07/10 | Red, Orange & Green Ball Leinster Tour Part 31 | |
| 14/10 to 26/11 | U10 Doubles Winter Weekends | |
| 15/10 to 03/12 | 2023 Leinster Regional Winter League | |
| 21/10 to 22/10 | Red, Orange & Green Ball Leinster Tour Part 32 | |
| 01/11 to 10/11 | Red, Orange & Green Ball Leinster Tour Part 33 | |
| 19/11 to 17/12 | Red, Orange & Green Ball Leinster End of Year Championships 2023 | |
| 25/11 to 26/11 | Leinster Regional WInter Cup 2023 | |