On May 7, the site racked up 100m page views - including 30m on the constituency results section - and 9m video plays. The BBC's dedicated election site for mobile devices pulled in around 1m page views.
A BBC News search function for users to check results by postcode peaked at around 36,000 searches per minute, with the "search by name" function gaining a similar figure.
Friday's traffic figures on the main BBC News site beat the previous record of 9.2m users on November 5, 2008, for Barack Obama's win at the US presidential elections.
During the day of the general election on May 6, the BBC News site recorded 4m UK users, 45m page impressions and 3m video plays.
As power-sharing negotiations continued over the weekend following confirmation of a hung parliament, the site attracted 5.7m users on Saturday and 5m on Sunday.
Speaking to The Press Gazette, BBC News online editor Steve Herrmann said: "We had very close collaboration with newsgathering [and] fast reporting right down to local level from across the Nations and English Regions, and live video streams of all the key moments and programmes.
"Among the key elements that did well online were the daily live page coverage, the innovative and detailed interactive explainers created by the news website specials team and the unrivalled multi-platform results maps and graphics on the special election site."
Hosted by David Dimbleby, the Election 2010 programme attracted a peak audience of 6.6m on BBC One, BBC HD, the BBC News channel and BBC Two, with an average audience of 4.7m, or 36.1% of the viewing public.