1955 in Northern Ireland
- 21 July - The BBC brings into service its Divis transmitter, its first permanent facility serving Northern Ireland, marking the launch of a television service for Northern Ireland; the 35 kW transmissions can also be readily received in much of the Republic of Ireland.
Arts and literature
- Winners: Linfield
- 11 January - Brian Gregory, footballer.
- 20 January - Joe Doherty, volunteer in the Provisional Irish Republican Army.
- 25 February - Davy Hyland, Sinn Féin, later independent, MLA.
- 28 March - John Alderdice, Baron Alderdice, Alliance Party politician and Speaker of the Northern Ireland Assembly 1998-2004.
- 2 April - Michael Stone, Ulster loyalist paramilitary.
- 23 June - Ken Reid, television journalist.
- 6 July - Michael Boyd, theatre director.
- 1 August - Adrian Logan, television sports presenter and reporter.
- 27 September
- 30 September - Frankie Kennedy, traditional flute and tin whistle player and co-founder of Altan (died 1994).
- 16 October - Kieran Doherty, volunteer in the Provisional Irish Republican Army (died on hunger strike 1981).
- 7 December - John McClelland, footballer.
- 22 January - Moira O'Neill, poet (born 1864).
- 14 May - Robert Quigg, soldier, recipient of the Victoria Cross for gallantry in 1916 at the Battle of the Somme (born 1885).
- 18 July - Billy McCandless, footballer and football manager (born 1894).
- 14 December - Paddy Mayne, international rugby union footballer and decorated soldier (born 1915).