A victory tweet from President Barack Obama - "Four more years" with a picture of him hugging his wife - was the most retweeted ever, but the U.S. election was topped by the Olympics as the most tweeted event this year.
Obama's tweet was retweeted (repeated) more than 810,000 times, Twitter said as it published a list of the most tweeted events in 2012.
"Within hours, that tweet simultaneously became the most retweeted of 2012, and the most retweeted ever. In fact, retweets of that simple message came from people in more than 200 countries around the world," Twitter spokeswoman Rachael Horwitz said.
Twitter users were busiest during the final vote count for the presidential elections, sending 327,452 tweets per minute on election night on their way to a tally of 31 million election tweets for the day.
London's 2012 Olympic Games had the most overall tweets of any event, with 150 million sent over the 16 days.
Usain Bolt's golden win in the 200 metres topped 80,000 tweets per minute but he did not achieve the highest Olympic peak on Twitter.
That was seen during the closing ceremony when 115,000 tweets per minute were sent as the Spice Girls performed.
