Ghana’s President has congratulated President Alassane Ouattara for winning a second-term in office.
“I congratulate President Ouattara on his resounding and emphatic victory. The sovereign people of La Cote D’Ivoire have voted for continuity,” Mr Mahama said in a statement.
Mr Ouattara won a second five-year term with nearly 84% of the vote.
His previous victory was rejected by the incumbent, Laurent Gbagbo, sparking a civil war which killed 3,000 people.
Mr Ouattara's closest challenger, Pascal Affi N'Guessan, got 9%. He is an ally of Mr Gbagbo, who faces trial at the International Criminal Court.
Several candidates withdrew from the poll, saying it was not free and fair.
The 55% turnout was sharply down compared to 80% in 2010.
Mr Ouattara required more than 50% of the vote to avoid a run-off.
Mr Mahama, who is also seeking to retain power for a second four-year term also said: “My congratulations also go to the people of Cote D’Ivoire for a successful election,” pledging: “ I will continue to work closely with President Ouattara.”
He said: “The strong bond of solidarity and economic cooperation we continue to enjoy as two neighbouring countries is linked to the peace and stability of the sub-region.