Boundary set for Northern Ireland (13 April 2010 - 30 May 2024) Majorities

Constituency areas Establishing legislation General elections By-elections Majorities Vote shares of winning candidate Turnouts General election party performance

Constituency area	Election type	Polling date	Winning party	Majority	Valid vote count	Majority / valid vote count
Belfast East	General election	6 May 2010	APNI	1,533	34,488	4.4%
Belfast East	General election	7 May 2015	DUP	2,597	39,682	6.5%
Belfast East	General election	8 June 2017	DUP	8,474	42,890	19.8%
Belfast East	General election	12 December 2019	DUP	1,819	42,445	4.3%
Belfast North	General election	6 May 2010	DUP	2,224	36,993	6.0%
Belfast North	General election	7 May 2015	DUP	5,326	40,593	13.1%
Belfast North	General election	8 June 2017	DUP	2,081	45,936	4.5%
Belfast North	General election	12 December 2019	SF	1,943	49,037	4.0%
Belfast South	General election	6 May 2010	SDLP	5,926	34,186	17.3%
Belfast South	General election	7 May 2015	SDLP	906	38,957	2.3%
Belfast South	General election	8 June 2017	DUP	1,996	43,705	4.6%
Belfast South	General election	12 December 2019	SDLP	15,401	47,352	32.5%
Belfast West	General election	6 May 2010	SF	17,579	32,133	54.7%
Belfast West	General election	7 May 2015	SF	12,365	35,329	35.0%
Belfast West	General election	8 June 2017	SF	21,652	40,633	53.3%
Belfast West	General election	12 December 2019	SF	14,672	38,782	37.8%
East Antrim	General election	6 May 2010	DUP	6,770	30,502	22.2%
East Antrim	General election	7 May 2015	DUP	5,795	33,497	17.3%
East Antrim	General election	8 June 2017	DUP	15,923	38,143	41.7%
East Antrim	General election	12 December 2019	DUP	6,706	37,261	18.0%
East Londonderry	General election	6 May 2010	DUP	5,355	34,950	15.3%
East Londonderry	General election	7 May 2015	DUP	7,804	34,714	22.5%
East Londonderry	General election	8 June 2017	DUP	8,842	41,030	21.6%
East Londonderry	General election	12 December 2019	DUP	9,607	39,302	24.4%
Fermanagh and South Tyrone	General election	6 May 2010	SF	4	46,803	0.0%
Fermanagh and South Tyrone	General election	7 May 2015	UUP	530	50,864	1.0%
Fermanagh and South Tyrone	General election	8 June 2017	SF	875	53,481	1.6%
Fermanagh and South Tyrone	General election	12 December 2019	SF	57	50,762	0.1%
Foyle	General election	6 May 2010	SDLP	4,824	37,889	12.7%
Foyle	General election	7 May 2015	SDLP	6,046	37,002	16.3%
Foyle	General election	8 June 2017	SF	169	45,965	0.4%
Foyle	General election	12 December 2019	SDLP	17,110	47,144	36.3%
Lagan Valley	General election	6 May 2010	DUP	10,486	36,540	28.7%
Lagan Valley	General election	7 May 2015	DUP	13,000	39,795	32.7%
Lagan Valley	General election	8 June 2017	DUP	19,229	44,926	42.8%
Lagan Valley	General election	12 December 2019	DUP	6,499	45,405	14.3%
Mid Ulster	General election	6 May 2010	SF	15,363	40,842	37.6%
Mid Ulster	General election	7 May 2015	SF	13,617	40,922	33.3%
Mid Ulster	General election	8 June 2017	SF	12,890	46,694	27.6%
Mid Ulster	General election	12 December 2019	SF	9,537	44,620	21.4%
Newry and Armagh	General election	6 May 2010	SF	8,331	44,906	18.6%
Newry and Armagh	General election	7 May 2015	SF	4,176	49,877	8.4%
Newry and Armagh	General election	8 June 2017	SF	12,489	53,579	23.3%
Newry and Armagh	General election	12 December 2019	SF	9,287	50,779	18.3%
North Antrim	General election	6 May 2010	DUP	12,558	42,397	29.6%
North Antrim	General election	7 May 2015	DUP	11,546	41,907	27.6%
North Antrim	General election	8 June 2017	DUP	20,643	48,460	42.6%
North Antrim	General election	12 December 2019	DUP	12,721	44,051	28.9%
North Down	General election	6 May 2010	Ind	14,364	33,481	42.9%
North Down	General election	7 May 2015	Ind	9,202	35,947	25.6%
North Down	General election	8 June 2017	Ind	1,208	39,185	3.1%
North Down	General election	12 December 2019	APNI	2,968	40,643	7.3%
South Antrim	General election	6 May 2010	DUP	1,183	34,009	3.5%
South Antrim	General election	7 May 2015	UUP	949	36,523	2.6%
South Antrim	General election	8 June 2017	DUP	3,208	43,170	7.4%
South Antrim	General election	12 December 2019	DUP	2,689	42,974	6.3%
South Down	General election	6 May 2010	SDLP	8,412	42,589	19.8%
South Down	General election	7 May 2015	SDLP	5,891	42,697	13.8%
South Down	General election	8 June 2017	SF	2,446	50,893	4.8%
South Down	General election	12 December 2019	SF	1,620	49,762	3.3%
Strangford	General election	6 May 2010	DUP	5,876	32,505	18.1%
Strangford	General election	7 May 2015	DUP	10,185	33,924	30.0%
Strangford	General election	8 June 2017	DUP	18,343	38,749	47.3%
Strangford	General election	12 December 2019	DUP	7,071	37,485	18.9%
Upper Bann	General election	6 May 2010	DUP	3,361	41,383	8.1%
Upper Bann	General election	7 May 2015	DUP	2,264	47,219	4.8%
Upper Bann	General election	8 June 2017	DUP	7,992	51,258	15.6%
Upper Bann	General election	12 December 2019	DUP	8,210	50,045	16.4%
West Tyrone	General election	6 May 2010	SF	10,685	37,275	28.7%
West Tyrone	General election	7 May 2015	SF	10,060	38,654	26.0%
West Tyrone	General election	8 June 2017	SF	10,342	43,486	23.8%
West Tyrone	By-election	3 May 2018	SF	7,956	35,029	22.7%
West Tyrone	General election	12 December 2019	SF	7,478	41,186	18.2%