The Northern Ireland Bridge Union (NIBU) promotes and organises the game of contract bridge in Northern Ireland. It supports a network of affiliated clubs and online clubs, and provides information and resources for players, members and organisers. Its activities include leagues, knockout cup competitions, congresses, interclub events and online bridge sessions, with results, calendars and entry forms available through its website.

NIBU also helps players develop and participate through bridge classes, master-point information, rankings and guidance on promotions and regradings. It selects and supports representative teams competing in events such as the Camrose, Lady Milne, Teltscher and interprovincial championships, and shares news about trials and results. The union publishes details of local and international bridge events, including tournaments hosted by clubs, and provides contact information, administration resources and updates from its council.

NIBU is preparing to join the Contract Bridge Association of Ireland and the Irish Bridge Union in forming Bridge Ireland, scheduled to begin on 1 January 2027.