| 2018−19 LEN Euro Cup | |
| League: | LEN Euro Cup |
| Sport: | Water Polo |
| Pixels: | 180px |
| Duration: | 28 September 2018 to 13 April 2019 |
| No Of Teams: | 19 |
| Finals Champ: |  CN Marseille (1st title) |
| Finals Runner-Up: |  PVK Jadran |
| Seasonslist: | LEN Euro Cup |
| Seasonslistnames: | Euro Cup |
| Prevseason Link: | 2017–18 LEN Euro Cup |
| Prevseason Year: | 2017–18 |
| Nextseason Link: | 2019–20 LEN Euro Cup |
| Nextseason Year: | 2019−20 |
The 2018–19 LEN Euro Cup was the second tier of European competition in water polo. It ran from 28 September 2018 to 13 April 2019.
| Qualification round I | |||||
|---|---|---|---|---|---|
 VK Partizan | SG Neukölln Berlin | NC Ydraikos | |||
| VK Nais |  RN Savona | ||||
| VK Primorje |  CN Barcelona | ||||
| VK Mornar | |||||
| Quarter-finals | |||||
The schedule of the competition is as follows. [1]
| Phase | Round | First leg | Second leg |
|---|---|---|---|
| Qualifying | Qualification round I | 28–30 September 2018 | |
| Qualification round II | 12–14 October 2018 | ||
| Knockout stage | Quarter-finals | 21 November 2018 | 5 December 2018 |
| Semi-finals | 23 January 2019 | 27 February 2019 | |
| Final | 30 March 2019 | 13 April 2019 | |
|}
|}
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