1984–85 Országos Bajnokság I (men's water polo)

The 1984–85 Országos Bajnokság I (OB I) was the season of the highest level of Hungarian men's water polo league. It was the 79th season of the competition. The OB I features multiple teams competing in a league format, ultimately culminating in a championship for the team with the best record or through a playoff system. Key aspects of a season would include the participating teams, the final standings, the championship winner, and potentially notable player performances. Without specific data, general information about the typical structure of Hungarian water polo leagues is offered.