Pennsylvania has been dubbed the most important swing-state for this election by multiple outlets. Here's Nate Silver's take on PA's result timing.
> It’ll be slow going. Although around half of Pennsylvanians are expected to vote absentee, those ballots can’t start being processed until 7 a.m. on Nov. 3. Simply put, that’s not enough time for many counties to count them all before the day is over. (For example, Bucks County plans to count ballots 24 hours a day and still doesn’t expect to be done until the end of the week.) Some places aren’t even going to try; Cumberland and Erie counties, for instance, say they won’t count absentee ballots until they’re done with Election Day votes, which could be as late as Wednesday morning. And even counties that manage to count all the ballots in their possession on election night will have to wait until Nov. 6 — the deadline for most mail ballots to arrive — to consider their results complete. Overall, election officials estimate that “the overwhelming majority” of votes will be counted by Friday. That said, don’t rule out an even longer wait. During the June primary, about half of counties were still counting a week after the election. No matter what, we’ll definitely know the outcome by Nov. 23 — the deadline for counties to stop counting.
> It’ll be slow going. Although around half of Pennsylvanians are expected to vote absentee, those ballots can’t start being processed until 7 a.m. on Nov. 3. Simply put, that’s not enough time for many counties to count them all before the day is over. (For example, Bucks County plans to count ballots 24 hours a day and still doesn’t expect to be done until the end of the week.) Some places aren’t even going to try; Cumberland and Erie counties, for instance, say they won’t count absentee ballots until they’re done with Election Day votes, which could be as late as Wednesday morning. And even counties that manage to count all the ballots in their possession on election night will have to wait until Nov. 6 — the deadline for most mail ballots to arrive — to consider their results complete. Overall, election officials estimate that “the overwhelming majority” of votes will be counted by Friday. That said, don’t rule out an even longer wait. During the June primary, about half of counties were still counting a week after the election. No matter what, we’ll definitely know the outcome by Nov. 23 — the deadline for counties to stop counting.