Changes at the polls: what you need to know to make sure your vote counts Polls are open in Pennsylvania until 8 pm. Mail-in ballots are also due at that time. Postmarks do not count. Author: Jamie Bittner (FOX43) Updated: 5:17 PM EDT May 18, 2021 A steady stream of people arrived to drop off their mail-in ballots and cast their votes in polling places for Pennsylvania's primary election day Tuesday. However, in most polling locations the long lines visible during the Presidential election of 2020 were gone. In York County, leaders told FOX43 they counted nearly 100,000 mail-in ballots for the Presidential election. In 2021, the county was expecting 25,564. As of Tuesday morning the county had received 16,016 of those votes. Once again in Pennsylvania, counties were not allowed to begin the process of opening mail-in ballots until 7 am on election day. Overall in Pennsylvania, 800,000 people requested a mail-in ballot.