| 4th Northern Ireland Assembly | |||||||||||
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| Overview | |||||||||||
| Legislative body | Assembly | ||||||||||
| Jurisdiction | Northern Ireland | ||||||||||
| Meeting place | Parliament Buildings, Stormont | ||||||||||
| Term | 12 May 2011 – 29 March 2016 | ||||||||||
| Election | 2011 assembly election | ||||||||||
| Government | Executive of the 4th Assembly | ||||||||||
| Members | 108 | ||||||||||
| Speaker | Mitchel McLaughlin — William Hay until 13 October 2014 | ||||||||||
| First Minister | Arlene Foster — Peter Robinson until 11 January 2016 — Arlene Foster (Acting) until 20 October 2015 — Peter Robinson until 30 September 2015 | ||||||||||
| Deputy First Minister | Martin McGuinness — John O'Dowd (Acting) until 31 October 2011 — Martin McGuinness until 20 September 2011 | ||||||||||
| Sessions | |||||||||||
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The fourth Northern Ireland Assembly was the unicameral devolved legislature of Northern Ireland following the 2011 assembly election on 5 May 2011.[1] This iteration of the elected Assembly convened for the first time on 12 May 2011 in Parliament Buildings in Stormont, and ran for a full term.
The election saw 18 Assembly constituencies return six Members of the Legislative Assembly (MLAs) each. The Democratic Unionist Party (DUP), led by Peter Robinson, remained the largest unionist party and the largest overall. Sinn Féin, led by Gerry Adams, remained the largest Irish nationalist party and the second largest overall. As per the Belfast Agreement and the St Andrews Agreement, a power-sharing coalition was then formed with the DUP, Sinn Féin, the Ulster Unionist Party (UUP), the Social Democratic and Labour Party (SDLP) and the Alliance Party of Northern Ireland. William Hay was elected as Speaker in the first sitting of the assembly. Following Hay's retirement, Mitchel McLaughlin was elected as the first nationalist Speaker in October 2014.
The UUP, led by Tom Elliott, and the SDLP, led by Margaret Ritchie, secured fewer seats than in the previous assembly. The Alliance Party, led by David Ford, emerged from the election with an increased mandate after securing an additional seat. The four main parties which sat outside of the Northern Ireland Executive and thereby served unofficially in opposition were the Green Party in Northern Ireland, the Traditional Unionist Voice, NI21 and the United Kingdom Independence Party.
More than three quarters of the members of the 3rd Northern Ireland Assembly were re-elected to the 4th: 83 MLAs had been members for all or part of the assembly's previous term. This included 11 individuals who became MLAs in the previous assembly by virtue of co-option. Twenty of the MLAs elected in 2011 were women. 25 new MLAs were elected to the assembly, 23% of the total.