The re-elected US president posted a photo of himself hugging the First Lady Michelle Obama on the micro-blogging site soon after the result was confirmed.
The photo came with the simple caption: "Four more years."
Four more years. twitter.com/BarackObama/st…— Barack Obama (@BarackObama) November 7, 2012
It had been shared on the site over 500,000 times in just a few hours, making it the most popular tweet ever by more than 100,000 already.
A further tweet by Obama was not far behind, being retweeted 200,000 times.
The second tweet read: "This happened because of you. Thank you."
The US presidential election set a Twitter record by hitting 31.7 million messages relating to the event.
The incumbent president of the United States was re-elected for four more years, beating his Republican rival Mitt Romney to the White House.