The turnout for the 2015 Wesminster general election in Foyle was 53.58 per cent.
It decreased by almost five per cent from 2010 when the voter turnout was 58 per cent.
There were 70,035 people eligible to vote of which 37, 528 cast their vote.
The first ballot boxes in the Foyle constituency arrived at the count centre at Templemore Sports Complex shortly after 10:15pm.
The first candidates to arrive at the count centre were Kyle Thompson (UKIP) and Gary Middleton (DUP).
Shortly before midnight Mark Durkan arrived at the count centre with wife Jackie.
Soon after, Sinn Fein candidate, Gearóid O hEára arrived with Deputy First Minster, Martin McGuinness.
Mark Durkan took the seat in 2010 when he saw off the challenge of Sinn Fein’s Martina Anderson.
As a result of a pipe-bomb type attack during the count at the 2010 general election the car park at Templemore Sports Complex was closed.
Election staff, party activists and local media had to park their cars in a nearby business car park.
A result is expected in the early hours of Friday morning.
As soon as the Foyle seat is declared counters will begin counting votes to determine who will take the East Derry constituency.