Gonzaga College SJ is a voluntary Catholic boys' secondary school in Ranelagh, Dublin, Ireland.

[6] The school is located 4.4 km (2.7 mi) from Dublin city centre[7] on a large area of land including a front lawn with cricket crease, rugby pitches and tennis courts.

The school buildings include a library, chapel, clock tower, theatre, priests' residence, science block, and 84 individual classrooms.

[12] Visual arts, theatre, and music are emphasised in the curriculum; pupils are encouraged to study Latin and Greek.

[14] The 2023 team won the school's first ever Senior Cup],[15] beating holders Blackrock with a score of 35-31 on 17 March, 2023.

The school has produced a small number of professional rugby players and seven Irish internationals: Tony Ensor, John Cooney, Barry Bresnihan (who went on to represent the British and Irish Lions), Padraig Kenny, Kevin McLaughlin, Dominic Ryan, and Matt Healy.

The school has a tradition of strong chess teams which have been victorious in numerous Leinster and national championships.

In 2012, 2013 and 2014, they were Leinster and All Ireland champions at minor, junior and senior levels – an unprecedented clean sweep of Irish schools chess.

Many school chess players have built on their experiences at the college and after graduating continued to greater success, including International Masters Sam Collins and Mark Quinn.

The extension included the new Purdy Dining Hall, the new Coulson Theatre, a gym changing area, and classrooms.