Votes in Florida, a state with 29 electoral registers, are still being counted, including absentee ballots.
On Tuesday President Obama won 303 electoral college votes to Republican Mitt Romney's 206, helping him past the 270-vote winning post first.
President Obama has arrived back in Washington DC with his family to begin his second term in office.
The US President will tackle a looming budget crisis and work with Republicans in Congress, the Party which retained control of the House of Representatives on Tuesday, but failed to take the Senate.
From fiscal cliffs and trillion dollar debts to the threat of Iran, ITV News's Mark Austin outlines the issues facing the re-elected US President as he embarks on his final four years in office:
While both parties called for unity in Barack Obama's second term to solve the USA's problems, Mark Austin found voters fearful of gridlock.Read the full story ›
Biggest honor I could have: I just introd to my OFA colleagues:"plz welcome the re-elected president of the US Barack Obama"
John Boehner, the Republican Speaker of the House of Representatives, has said Washington should find a short-term solution to avoid the fiscal cliff and then work on a substantive debt reduction plan in 2013.
The White House and lawmakers have less than two months to deal with the fiscal cliff or $600 billion worth of spending cuts and tax increases due to go into effect at the end of the year.
We won't solve the problem of our fiscal imbalance overnight ... What we can do is avert the cliff in a manner that serves as a down payment on - and a catalyst for - major solutions, enacted in 2013, that begin to solve the problem.