2018–19 Serie A1 (men's water polo)

The 2018–19 Serie A1 is the 100th season of the Serie A1, Italy's premier Water polo league.

Team information
The following 14 clubs compete in the Serie A1 during the 2018–19 season:

Regular season
Pld - Played; W - Won; D - Drawn; L - Lost; GF - Goals for; GA - Goals against; Diff - Difference; Pts - Points.

Playoffs
The final six was held on 23–26 May 2019 at the Bruno Bianchi Swimming Stadium in Trieste.