Low turnout in the north's nationalist dominated constituencies gave the Leave camp a better regional result than predicted.
Northern Ireland voted to remain in the EU by a majority of 56 per cent to 44 per cent, compared to the overall UK result which gave the Leave campaign victory by a narrow margin.
Turnout in the north was 62.9 per cent, whereas 72.2 per cent of the electorate voted across the UK as a whole.
The republican stronghold of West Belfast, which gave decisive support for remaining in the EU, recorded the referendum's lowest proportion of voters, with just 48.85 per cent of the registered electorate going to the polls.
At 57 per cent, turnout in Foyle was also relatively low, though again the Remain camp secured a significant majority.
In North Down where historically turnout is low, 68 per cent of the electorate voted, however, unlike most unionist-dominated constituencies the Remain camp won a majority of almost 2,000.
In the rest of the north's parliamentary constituencies, turnout varied between 60-68 per cent.
Remain was also victorious in South Down, Newry & Armagh, Mid Ulster, Fermanagh-South Tyrone, North Belfast, South Belfast, East Derry and West Tyrone
The Leave campaign secured its strongest support in DUP-dominated North Antrim, where a majority of near 12,000 was secured. Other constituencies where the pro-Brexit camp prospered included East Antrim, East Belfast, Lagan Valley, Upper Bann and Strangford.
An opinion poll published by Millward Brown in the days leading up to the referendum suggested the Remain camp would win in the north by a margin of 16 per cent.
EU referendum: Northern Ireland result (per cent)
East Belfast
Leave: 51.4
Remain: 48.6
(Turnout: 66.5)
North Belfast
Leave: 49.6
Remain: 50.4
(Turnout: 57.5)
South Belfast
Leave: 30.5
Remain: 69.5
(Turnout: 67.6)
West Belfast
Leave: 25.9
Remain: 74.1
(Turnout: 48.9)
East Antrim
Leave: 55.2
Remain: 44.8
(Turnout: 65.2)
East Derry
Leave: 48
Remain 52
(Turnout: 59.9)
Fermanagh & South Tyrone
Leave: 41.4
Remain: 58.6
(Turnout: 67.9)
Foyle
Leave: 21.7
Remain: 78.3
(Turnout: 57.4)
Lagan Valley
Leave: 53.1
Remain: 46.9
(Turnout: 66.6)
Mid Ulster
Leave: 39.6
Remain: 60.4
(Turnout: 61.7)
Newry & Armagh
Leave: 37.1
Remain: 62.9
(Turnout: 63.7)
North Antrim
Leave: 62.2
Remain: 37.8
(Turnout: 64.9)
North Down
Leave: 47.6
Remain: 52.4
(Turnout: 67.7)
South Antrim
Leave: 50.6
Remain: 49.4
(Turnout: 63.4)
South Down
Leave: 32.8
Remain: 67.2
(Turnout: 62.4)
Strangford
Leave: 55.5
Remain: 44.5
(Turnout: 64.5)
Upper Bann
Leave: 52.6
Remain: 47.4
(Turnout: 63.8)
West Tyrone
Leave: 33.2
Remain: 66.8
(Turnout: 61.8)
NORTHERN IRELAND
Leave: 44.2
Remain: 55.8
(Turnout: 62.9)
EU referendum: Result in Britain
ENGLAND
Leave 53.4
Remain 46.6
(Turnout: 73)
SCOTLAND
Leave: 38.0
Remain: 62.0
(Turnout: 67.2)
WALES
Leave: 52.5
Remain: 47.5
(Turnout: 71.7)
UK OVERALL
Leave: 51.9
Remain: 48.1
(Turnout: 72.2)