UCD Marian Water Polo club, although only founded in 2008 actually owes its roots to Marian Water Polo Club which was founded in June 1967 in Marian College Ballsbridge. Drawing players from the school and alumnus, the club went on to become one of the most successful in Irish water polo, winning countless Leagues and Cups. The club ran into difficulties in 2004, and ultimately folded. The various players at the time spread to other clubs, some retiring from the game completely.

In 2007 a group of former players, mostly past pupils of the school, banded together with players from UCD to form UCD Marian Water Polo Club (borrowing the name of UCD Marian Basketball Club in the process) and entered a team into the Leinster league. Notable founding members of the club included John Ryan, Thomas Higgins and David O'Connor. Paul Lavery had the honour of becoming the clubs first president.

The club found life tough in its first season but the quality of performances and results steadily improved over time and past players and members started to take notice. The clubs profile grew to an extent that deputy lord mayor Kevin Humphreys presented the clubs player of the year award this year.

This season playing numbers have almost doubled and players old and new are signing up and at time of writing the club is unbeaten this season.

New members are always welcome, the club trains from 9 - 10.45pm on Mondays in Marian College Ballsbridge.