http://www.county.allegheny.pa.us/elect/absentee.aspThe ballot needs to get there by the Friday before Election Day. The address to mail the ballot is further down. I included the phone number below in case you want to call to verify the address. Godspeed.
Mark Wolosik, Division Manager
604 County Office Building,
542 Forbes Avenue,
Pittsburgh, PA 15219
Phone: (412)350-4500 Fax: (412)350-5697
How and Where to Apply for an Absentee Ballot
Qualifications for Absentee Voters
In order to vote by Absentee Ballot, you must be a registered voter, (unless you are a member of the Armed Forces or a hospitalized or bedridden veteran outside your county of residence). You must also either be:
Unable to attend your polling place due to illness or physical disability
Absent from your municipality of residence on the day of the election during the time the polls are open due to duties, occupation or business; or
Not attending your polling place on the day of the election during the time the polls are open due to your observance of a religious holiday.
How to Apply for an Absentee Ballot
Applications for Absentee Ballots are available at the Allegheny County Elections Division, Room 601 of the County Office Building, located at the corner of Forbes Avenue and Ross Street, downtown Pittsburgh, Pa., 15219 or for more information you may call (412) 350-4520. Regular business hours are 8:30 a.m. to 4:30 p.m.
You may also link to the Pennsylvania Department of State's web site. There you may download, print, complete, sign and send the form to:
Attn: Absentee Voting Section
Division of Elections
Allegheny County
542 Forbes Ave., Room 601
Pittsburgh, PA 15219-2953