A voter is eligible to vote absentee in an election if he or she cannot make it to the polls on Election Day for one of the following reasons:

• A person who is or may be in the military service of the United States, regardless of whether at the time of voting the person is present in the election district of residence or in the Commonwealth and regardless of whether he or she is registered to vote.
• A spouse or dependent residing with or accompanying a person in the military service of the United States and who expects on Election Day to be absent from his or her municipality of residence during the entire period in which the polling places are open for voting (7 a.m. to 8 p.m.).
• A member of the Merchant Marine and his/her spouse and dependents residing with or accompanying the Merchant Marine, who expect on Election Day to be absent from the Commonwealth or the municipality of residence during the entire period in which the polling places are open for voting (7 a.m. to 8 p.m.).
• A member of a religious or welfare group attached to and serving with the armed forces and his/her spouse and dependents residing with or accompanying him or her, who expect on Election Day to be absent from the Commonwealth or the municipality of residence during the entire period in which the polling places are open for voting (7 a.m. to 8 p.m.).
• An individual who, because of the elector's duties, occupation or business (including attendance of college in another county/state, leaves of absence for teaching, vacations and sabbatical leaves), expects on Election Day to be absent from his/her municipality of residence during the entire period the polls are open for voting and the spouse and dependents of such electors who are residing with or accompanying the elector and for that reason also expect to be absent from his/her municipality during the entire period the polls are open for voting (7 a.m. to 8 p.m.).
• A qualified war veteran elector who is bedridden or hospitalized due to illness or physical disability if the elector is absent from the municipality of his residence and unable to attend his/her polling place because of such illness or disability, regardless of whether the elector is registered to vote.
• A person who, because of illness or physical disability, is unable to attend his/her polling place or to operate a voting machine and obtain assistance by distinct and audible statements. (Note: A disabled elector may be placed on a permanently disabled absentee file.)
• A spouse or dependent accompanying a person employed by the Commonwealth or the Federal Government, in the event that the employee's duties, occupation or business on Election Day require him/her to be absent from the Commonwealth or the municipality of residence during the entire period the polls are open for voting (7 a.m. to 8 p.m.).
• A county employee who expects that his Election Day duties relating to the conduct of the election will prevent the employee from voting.
• A person who will not attend a polling place on Election Day because of the observance of a religious holiday

• In-Person: 15 days before Election Day.
• By Mail: Must be received 15 days before Election Day.
• Online: 15 days before Election Day.

To register in Pennsylvania you must:

• be a citizen of the United States at least one month before the next election
• be a resident of Pennsylvania and your election district at least 30 days before the election
• be at least 18 years of age on the day of the next election