"One hundred million votes and 31 million Tweets later, Election Day 2012 has come to a close," the social networking site said on its official government and politics handle @gov.
Earlier, the same handle 'Twitter Government' announced, "With 20 million tweets, Election Day just became the most tweeted about event in US political history. #election2012."
The campaigns of both President Barack Obama and his Republican rival Mitt Romney have extensively used social media to reach out to voters in their gruelling battle for the White House.
"This happened because of you. Thank you. Four more years," Obama tweeted on his official account soon after he defeated Romney.
