Obama emerged victorious in last week's US presidential election, earning 332 electoral votes to Republican challenger Mitt Romney's 206.
U2 frontman Bono has been in the US this week for the Global Social Enterprise Initiative at Georgetown University, where he sent a congratulatory message to Obama.
"Congratulations are in order not just for turning out in record numbers – and forgetting politics for a minute – but for electing an extraordinary man as president," the 'Elevation' singer said, reports The AP.
He added: "I think you have to say that whatever your political tradition."
Bono also met with US Vice President Joe Biden at the White House on Tuesday (November 13) to discuss the administration's HIV/AIDS and global poverty policies.
The U2 singer has publicly lobbied for increased aid by first-world nations to impoverished countries for much of his career.
He also founded Project Red to raise money for the Global Fund to Fight AIDS, Tuberculosis and Malaria.
Watch US perform 'One' from the 'ZooTV' tour below: