Palestinian President Mahmoud Abbas did not immediately issue a statement reacting to the election outcome, but lead Palestinian peace negotiator Saeb Erekat focused his comments on the need to re-start the peace process.
"Obama must take action to dry out the swamp that is the Israeli occupation, because this is the key to democracy," he said.
The militant group Hamas, which runs the Gaza Strip and the U.S. considers a terrorist organization, said it hoped the re-election would mean a reevaluation by the administration of policy in the Arab world and its support of Israel.
British Prime Minister David Cameron, who along with Obama is the custodian of what Winston Churchill first called the "special relationship," issued a more casual of statement.
"Congratulations to Barack. I've enjoyed working with him, I think he's a very successful U.S. president and I look forward to working with him in the future," he said.
ABC News' Karson Yiu, Aleem Agha, Habibullah Khan, Alexander Marquardt, Dimitrije Stejic, and Bazi Kanani contributed to this report.