If you haven't registered yet, you can do so in person at your county election office, or at a PennDOT facility along with other government agencies.
The last day to request a mail-in or absentee ballot is May 12th.
Those ballots must be received by your county elections office by 8 pm on May 19th which is primary day.
Polls will be open on May 19th from 7am until 8pm.
Pennsylvania has a closed primary system.
This means that Republican voters can vote only for Republican candidates and Democratic voters can vote only for Democratic candidates.