Nick Clegg, Facebook's head of global affairs, told The Financial Times in an interview that the company has plans in place in case of widespread chaos.
Clegg did not elaborate on exactly what measures Facebook is considering.
But he said that the company would make aggressive moves to "restrict the circulation of content" that it thought may further inflame the situation.
He said big decisions will fall to executives like him and COO Sheryl Sandberg, and that Zuckerberg will be able to overrule decisions.
Clegg's interview echoed concerns raised in an interview CEO Mark Zuckerberg gave to Axios earlier this month, discussing the potential for "civil unrest" in the wake of the vote.
Clegg said the company was ready for a range of situations.
Another scenario is a period of limbo after November 3, where in-person votes, counted quickly, signal one result which later changes when mail-in ballots are taken into account.
President Donald Trump too has been preparing for this scenario, painting mail-in voting โ which experts consider to be safe โ as an unreliable form of voting that Democrats could use to rig the election.
Comment: Which experts consider it safe? All experts universally across the board?
Facebook did not elaborate on its plans to the FT, claiming that knowledge of its plans could allow some people to work out how to overcome its restrictions.
The company is facing intense scrutiny over how it deals with election-related misinformation, and how it expects to manage this, and any election-related backlash, in November.
Clegg said Facebook has "acted aggressively in other parts of the world where we think that there is real civic instability" and said the company has previously elsewhere used "pretty exceptional measures to significantly restrict the circulation of content on our platform."
He said that Facebook "obviously" can do that again.
A source familiar with Facebook's workings told the FT that Facebook has used military scenario planners to decide how it should respond to around 70 different outcomes in the US.
Comment: Why even pretend that Facebook doesn't have a political agenda? At every turn, they prove themselves to be, not an unbiased, non-partisan and neutral platform as they claim, but the exact opposite. Their response to post-election mayhem, therefore, will simply be more of the same social engineering we've all come to know and love.
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