Events during the year 2018 in Northern Ireland.

• First Minister – Vacant
• deputy First Minister – Vacant
• Secretary of State for Northern Ireland – James Brokenshire (until 8 January), Karen Bradley (from 8 January)

• 8 January – Sinn Féin MP Barry McElduff was suspended from all party activity for three months after he posted a video online that relatives of the victims of the 1976 Kingsmill massacre described as callous and offensive. He resigned as an MP a week later.^[1]
• 15 January – Resignation of Sinn Féin MP, Barry McElduff, which will result in a by-election for West Tyrone^[2] on 3 May; the seat is retained by Sinn Féin.
• 10 October – In a unanimous decision, the Supreme Court of the U.K. rules the Christian owners of Ashers Baking Co. were not obliged by law to make a cake featuring the words "Support Gay Marriage".^[3][4]

• 4 January – Sitcom Derry Girls, set in the 1990s, premieres on Channel 4 television.^[5]
• 4 April – The BBC Radio 2 Folk Awards take place at the Waterfront Hall in Belfast.^[6]
• May – Anna Burns' novel Milkman, set in a fictionalised Belfast during The Troubles, is published; on 16 October it is awarded the Man Booker Prize, making the author its first winner from Northern Ireland.^[7]

• 3 March – Arthur Stewart, footballer (Glentoran, Derby County, Detroit Cougars) (b. 1958)^[8]
• 7 July – William Dunlop, motorcycle racer, collision during practice (b. 1985)^[9]
• 10 July – John Laird, Baron Laird, Unionist politician (b. 1944)^[10]
• 5 September – Robert Coulter, Unionist politician, MLA for Antrim North (1998–2011) (b. 1929)^[11]
• 22 September – Jo Gilbert, film producer (Closing the Ring) and casting director, brain tumour (b. 1955 in England)^[12]
• 4 October – Bertie McMinn, footballer (Distillery, Glenavon, Moyola Park), cancer (b. 1958)^[13]
• 11 October – Jimbo Simpson, UDA paramilitary, lung cancer, 60^[14]

• 2018 in England
• 2018 in Scotland
• 2018 in Wales