Coverage of the election, which saw Barack Obama appointed for a second term, brought 16.4 million unique browsers across the BBC website and mobile services on November 7. This included 8.1m from the UK.
Wednesday was the highest traffic day of 2012 so far, although not quite as high as the BBC's biggest ever day, which came during the August riots last year.
On August 9, 2011, there were 18.2m unique browsers, 10.9m of which came from the UK, as people flocked to the BBC for news on the unrest that hit English cities.
In a blog post, BBC News website editor Steve Herrmann said that the peak traffic point on November 7 was between 7am and 8am, as people in the UK checked the result as soon as they woke up.
"We spent a lot of time working out how to provide the best possible service on mobile, so it's encouraging to see that nearly 5m mobile devices visited BBC News Online [on Wednesday], a record figure for us on mobile, accounting for about 30% of all users," Hermann added.
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