The 2015–16 Országos Bajnokság I (known as the e·on férfi OB I osztályú Országos Bajnokság for sponsorship reasons) was the 110th season of the Országos Bajnokság I, Hungary's premier Water polo league.
The following 16 clubs compete in the OB I during the 2015–16 season: Pld - Played; W - Won; D - Drawn; L - Lost; GF - Goals for; GA - Goals against; Diff - Difference; Pts - Points.
[1] Pld - Played; W - Won; D - Drawn; L - Lost; GF - Goals for; GA - Goals against; Diff - Difference; Pts - Points.
Szolnoki Dózsa-KÖZGÉP won the FINAL series 3–2.
LEN Champions League