In order to qualify to vote, one must also be a United States citizen at least one month prior to the primary, a resident of Pennsylvania in your election district at least 30 days before the primary, and 18 years old on or before the day of the primary.
Qualifications for Voters at a PrimaryThe qualifications for a voter entitled to vote at a primary are the same as a voter entitled to vote at an election, except that he or she must be registered in a political party in order to take part in and vote in that party’s primary. However, all registered voters are entitled to vote on questions placed on the ballot.