2017–18 LEN Champions League
| 2017–18 LEN Champions League | |
|---|---|
| League | LEN Champions League |
| Sport | Water Polo |
| Number of teams | 16 (preliminary round) |
| Season MVP | Josip Pavic (Olympiacos) |
| Top scorer | Darko Brguljan 42 goals (Hannover) |
| Final Eight | |
| Champions | Olympiacos (2nd title) |
| Runners-up | Pro Recco |
| Finals MVP | Josip Pavic (Olympiacos) |
The 2017–18 LEN Champions League was the 55th edition of LEN's premier competition for men's water polo clubs.