2025–26 Leinster Rugby season
| 2025–26 season | |
| Head coach | Leo Cullen |
|---|---|
| Chief executive | Shane Nolan |
| Top try scorer | League: Scott Penny - 2 tries |
| Top points scorer | League: Sam Prendergast - 15 points |
| Highest home attendance | 51,859 (vs Munster, URC Rd 4} |
| Lowest home attendance | 14,128 (vs Zebre, URC Rd 5) |
| Average home attendance | 25,727 |
The 2025–26 season is Leinster Rugby's fifth season in the United Rugby Championship (URC), their 32nd season of professional rugby and their 138th season of representative rugby since their foundation. Along with competing in the URC and its Irish Shield competition, both of which it will enter as champion, the club will also participate in the 2025–26 European Rugby Champions Cup. Leinster will open the URC season with an away tie at Stormers on 26 September 2025.
Leinster Women will contest the 2025 IRFU Women's Interprovincial Series, branded the Vodafone Women's Interprovincial Championship for sponsorship reasons, as defending champions, opening their season on 10 August 2025 against Ulster Women. They will also field the combined Wolfhounds team, with Ulster Rugby in the 2025–26 Celtic Challenge, once more as defending champions.