County | County Seat | Zip Code |
| ADAMS | Gettysburg | 17325 |
| ALLEGHENY | Pittsburgh | 15219 |
| ARMSTRONG | Kittanning | 16201 |
| BEAVER | Beaver | 15009 |
| BEDFORD | Bedford | 15522 |
| BERKS | Reading | 19601 |
| BLAIR | Hollidaysburg | 16648 |
| BRADFORD | Towanda | 18848 |
| BUCKS | Doylestown | 18901 |
| BUTLER | Buttler | 16001 |
| CAMBRIA | Ebensburg | 15931 |
| CAMERON | Emporium | 15834 |
| CARBON | Jim Thorpe | 18229 |
| CENTRE | Bellefonte | 16823 |
| CHESTER | West Chester | 19380 |
| CLARION | Clarion | 16214 |
| CLEARFIELD | Clearfield | 16830 |
| CLINTON | Lock Haven | 17745 |
| COLUMBIA | Bloomsburg | 17815 |
| CRAWFORD | Meadville | 16335 |
| CUMBERLAND | Carlisle | 17016 |
| DAUPHIN | Harrisburg | 17101 |
| DELAWARE | Media | 19063 |
| ELK | Ridgeway | 15853 |
| ERIE | Erie | 16501 |
| FAYETTE | Uniontown | 15401 |
| FOREST | Tionesta | 16353 |
| FRANKLIN | Chambersburg | 17201 |
| FULTON | McConnellsburg | 17233 |
| GREENE | Waynesburg | 15370 |
| HUNTINGDON | Huntingdon | 16652 |
| INDIANA | Indiana | 15701 |
| JEFFERSON | Brookville | 15825 |
| JUNIATA | Mifflintown | 17059 |
| LACKAWANNA | Scranton | 18503 |
| LANCASTER | Lancaster | 17603 |
| LAWRENCE | New Castle | 16101 |
| LEBANON | Lebanon | 17042 |
| LEHIGH | Allentown | 18105 |
| LUZERNE | Wilkes-Barre | 18702 |
| LYCOMING | Williamsport | 17701 |
| MCLEAN | Smithport | 16749 |
| MERCER | Mercer | 16137 |
| MIFFLIN | Lewistown | 17044 |
| MONROE | Stroudsburg | 18360 |
| MONTGOMERY | Norristown | 19404 |
| MONTOUR | Danville | 17821 |
| NORTHAMPTON | Easton | 18042 |
| NORTHUMBERLAND | Sunbury | 17801 |
| PERRY | New Bloomfield | 17068 |
| PHILADELPHIA | Philadelphia | 19107 |
| PIKE | Milford | 18337 |
| POTTER | Coudersport | 16915 |
| SCHUYLKILL | Pottsville | 17901 |
| SNYDER | Middleburg | 17842 |
| SOMERSET | Somerset | 15501 |
| SULLIVAN | Laporte | 18626 |
| SUSQUEHANNA | Montrose | 18801 |
| TIOGA | Wellsboro | 16901 |
| UNION | Lewisburg | 17837 |
| VENANGO | Franklin | 16323 |
| WARREN | Warren | 16965 |
| WASHINGTON | Washington | 15301 |
| WAYNE | Honesdale | 18431 |
| WESTMORELAND | Greensburg | 15601 |
| WYOMING | Tunkhannock | 18657 |
| YORK | York | 17401 |