Courthouses are important places to look for birth, marriage and death records. These are usually found in the Register of Wills office in each county. Records in the Recorder of Deeds offices can also be useful. Naturalization records are usually held by the Prothonotary's Office in each county.
| County | County Seat | Zip Code | Telephone Number |
| ADAMS | Gettysburg | 17325 | (717) 337-9820 |
| ALLEGHENY | Pittsburgh | 15219 | (412) 350-4636 |
| ARMSTRONG | Kittanning | 16201 | (724) 543-2500 |
| BEAVER | Beaver | 15009 | (724) 728-5700 |
| BEDFORD | Bedford | 15522 | (814) 623-4807 |
| BERKS | Reading | 19601 | (610) 478-6100 |
| BLAIR | Hollidaysburg | 16648 | (814) 693-3000 |
| BRADFORD | Towanda | 18848 | (570) 265-1727 |
| BUCKS | Doylestown | 18901 | (215) 348-6000 |
| BUTLER | Butler | 16001 | (724) 285-4731 |
| CAMBRIA | Ebensburg | 15931 | (814) 472-5440 |
| CAMERON | Emporium | 15834 | (814) 486-2315 |
| CARBON | Jim Thorpe | 18229 | (570) 325-4801 |
| CENTRE | Bellefonte | 16823 | (814) 355-6700 |
| CHESTER | West Chester | 19380 | (610) 344-6000 |
| CLARION | Clarion | 16214 | (814) 226-4000 |
| CLEARFIELD | Clearfield | 16830 | (814) 765-2641 |
| CLINTON | Lock Haven | 17745 | (570) 893-4000 |
| COLUMBIA | Bloomsburg | 17815 | (570) 389-5608 |
| CRAWFORD | Meadville | 16335 | (814) 333-7400 |
| CUMBERLAND | Carlisle | 17013 | (717) 240-6100 |
| DAUPHIN | Harrisburg | 17108 | (717) 780-6300 |
| DELAWARE | Media | 19063 | (610) 891-4000 |
| ELK | Ridgeway | 15853 | (814) 776-1161 |
| ERIE | Erie | 16501 | (814) 451-6000 |
| FAYETTE | Uniontown | 15401 | (724) 430-1200 |
| FOREST | Tionesta | 16353 | (814) 755-3537 |
| FRANKLIN | Chambersburg | 17201 | (717) 264-4125 |
| FULTON | McConnellsburg | 17233 | (717) 485-3691 |
| GREENE | Waynesburg | 15370 | (724) 852-5210 |
| HUNTINGDON | Huntingdon | 16652 | (814) 643-3091 |
| INDIANA | Indiana | 15701 | (724) 465-3800 |
| JEFFERSON | Brookville | 15825 | (814) 849-1653 |
| JUNIATA | Mifflintown | 17059 | (717) 436-7704 |
| LACKAWANNA | Scranton | 18503 | (570) 963-6800 |
| LANCASTER | Lancaster | 17608 | (717) 299-8300 |
| LAWRENCE | New Castle | 16101 | (724) 658-2541 |
| LEBANON | Lebanon | 17042 | (717) 274-2801 |
| LEHIGH | Allentown | 18101 | (610) 782-3000 |
| LUZERNE | Wilkes-Barre | 18711 | (570) 825-1500 |
| LYCOMING | Williamsport | 17701 | (570) 327-2200 |
| MCKEAN | Smethport | 16749 | (814) 887-3200 |
| MERCER | Mercer | 16137 | (724) 662-3800 |
| MIFFLIN | Lewistown | 17044 | (717) 248-6733 |
| MONROE | Stroudsburg | 18360 | (570) 517-3102 |
| MONTGOMERY | Norristown | 19404 | (610) 278-3000 |
| MONTOUR | Danville | 17821 | (570) 271-3000 |
| NORTHAMPTON | Easton | 18042 | (610) 559-3195 |
| NORTHUMBERLAND | Sunbury | 17801 | (570) 988-4100 |
| PERRY | New Bloomfield | 17068 | (717) 582-2131 |
| PHILADELPHIA | Philadelphia | 19107 | (215) 686-1776 |
| PIKE | Milford | 18337 | (570) 296-3423 |
| POTTER | Coudersport | 16915 | (814) 274-8290 |
| SCHUYLKILL | Pottsville | 17901 | (570) 622-5570 |
| SNYDER | Middleburg | 17842 | (570) 837-4208 |
| SOMERSET | Somerset | 15501 | (814) 445-1400 |
| SULLIVAN | Laporte | 18626 | (570) 946-5201 |
| SUSQUEHANNA | Montrose | 18801 | (570) 278-4600 |
| TIOGA | Wellsboro | 16901 | (570) 723-8191 |
| UNION | Lewisburg | 17837 | (570) 524-8600 |
| VENANGO | Franklin | 16323 | (814) 432-9500 |
| WARREN | Warren | 16365 | (814) 728-3400 |
| WASHINGTON | Washington | 15301 | (724) 228-6700 |
| WAYNE | Honesdale | 18431 | (570) 253-5970 |
| WESTMORELAND | Greensburg | 15601 | (724) 830-3000 |
| WYOMING | Tunkhannock | 18657 | (570) 836-3200 |
| YORK | York | 17401 | (717) 771-9964 |
Many Counties no longer use a central switchboard (or have a general information phone number). Therefore, some numbers are now either the Courthouse switchboard, general information or Commissioners office.
July 2009 Revision
