Three of the four Belfast constituencies have indicated a desire for NI to remain in the EU.
West, South and North Belfast all voted in favour of staying.
East Belfast voted overwhelmingly in favour of leaving.
The average turnout across all four areas was 59.8%, although West Belfast had a turnout of 48.85%.
Secretary of State Theresa Villiers has said a referendum on a united Ireland would not be “justified or helpful” at present.
Taoiseach Enda Kenny has said “the implications for NI and relations will require careful consideration” following the UK's Brexit vote.
Northern Ireland’s leaders have been divided in their reactions to the United Kingdom’s decision to leave the European Union.