| County Population Centroids for Pennsylvania |
| ST | COU | COUNTY NAME | POPULATION | LATITUDE | LONGITUDE |
| 42 | 001 | Adams | 91,292 | 39.852685 | -77.161122 |
| 42 | 003 | Allegheny | 1281666 | 40.443734 | -79.962191 |
| 42 | 005 | Armstrong | 72,392 | 40.770318 | -79.511626 |
| 42 | 007 | Beaver | 181,412 | 40.683637 | -80.302164 |
| 42 | 009 | Bedford | 49,984 | 40.053178 | -78.476806 |
| 42 | 011 | Berks | 373,638 | 40.366450 | -75.908762 |
| 42 | 013 | Blair | 129,144 | 40.487307 | -78.377501 |
| 42 | 015 | Bradford | 62,761 | 41.833269 | -76.529118 |
| 42 | 017 | Bucks | 597,635 | 40.235631 | -75.017374 |
| 42 | 019 | Butler | 174,083 | 40.835227 | -79.952278 |
| 42 | 021 | Cambria | 152,598 | 40.405281 | -78.803930 |
| 42 | 023 | Cameron | 5,974 | 41.501822 | -78.236013 |
| 42 | 025 | Carbon | 58,802 | 40.863386 | -75.722110 |
| 42 | 027 | Centre | 135,758 | 40.842167 | -77.841116 |
| 42 | 029 | Chester | 433,501 | 39.992833 | -75.671201 |
| 42 | 031 | Clarion | 41,765 | 41.181079 | -79.428292 |
| 42 | 033 | Clearfield | 83,382 | 40.991712 | -78.503456 |
| 42 | 035 | Clinton | 37,914 | 41.145151 | -77.458072 |
| 42 | 037 | Columbia | 64,151 | 41.039038 | -76.387463 |
| 42 | 039 | Crawford | 90,366 | 41.665382 | -80.100507 |
| 42 | 041 | Cumberland | 213,674 | 40.204117 | -77.098505 |
| 42 | 043 | Dauphin | 251,798 | 40.305443 | -76.798874 |
| 42 | 045 | Delaware | 550,864 | 39.921637 | -75.345323 |
| 42 | 047 | Elk | 35,112 | 41.420699 | -78.621406 |
| 42 | 049 | Erie | 280,843 | 42.068861 | -80.069716 |
| 42 | 051 | Fayette | 148,644 | 39.949933 | -79.711519 |
| 42 | 053 | Forest | 4,946 | 41.497458 | -79.299947 |
| 42 | 055 | Franklin | 129,313 | 39.882240 | -77.658151 |
| 42 | 057 | Fulton | 14,261 | 39.921474 | -78.084806 |
| 42 | 059 | Greene | 40,672 | 39.875606 | -80.122586 |
| 42 | 061 | Huntingdon | 45,586 | 40.423393 | -78.001103 |
| 42 | 063 | Indiana | 89,605 | 40.616382 | -79.127949 |
| 42 | 065 | Jefferson | 45,932 | 41.085233 | -78.966467 |
| 42 | 067 | Juniata | 22,821 | 40.571826 | -77.327429 |
| 42 | 069 | Lackawanna | 213,295 | 41.442752 | -75.636694 |
| 42 | 071 | Lancaster | 470,658 | 40.073302 | -76.289685 |
| 42 | 073 | Lawrence | 94,643 | 40.986171 | -80.338028 |
| 42 | 075 | Lebanon | 120,327 | 40.341378 | -76.443646 |
| 42 | 077 | Lehigh | 312,090 | 40.602584 | -75.504914 |
| 42 | 079 | Luzerne | 319,250 | 41.204836 | -75.926339 |
| 42 | 081 | Lycoming | 120,044 | 41.250072 | -76.986710 |
| 42 | 083 | McKean | 45,936 | 41.863962 | -78.582120 |
| 42 | 085 | Mercer | 120,293 | 41.265400 | -80.345245 |
| 42 | 087 | Mifflin | 46,486 | 40.602272 | -77.614995 |
| 42 | 089 | Monroe | 138,687 | 41.032378 | -75.308459 |
| 42 | 091 | Montgomery | 750,097 | 40.165679 | -75.305676 |
| 42 | 093 | Montour | 18,236 | 40.995555 | -76.628182 |
| 42 | 095 | Northampton | 267,066 | 40.699751 | -75.322248 |
| 42 | 097 | Northumberland | 94,556 | 40.871832 | -76.680849 |
| 42 | 099 | Perry | 43,602 | 40.410928 | -77.151383 |
| 42 | 101 | Philadelphia | 1517550 | 40.004835 | -75.141050 |
| 42 | 103 | Pike | 46,302 | 41.308916 | -74.980070 |
| 42 | 105 | Potter | 18,080 | 41.823133 | -77.936356 |
| 42 | 107 | Schuylkill | 150,336 | 40.716256 | -76.198565 |
| 42 | 109 | Snyder | 37,546 | 40.786302 | -76.983272 |
| 42 | 111 | Somerset | 80,023 | 40.031389 | -79.009657 |
| 42 | 113 | Sullivan | 6,556 | 41.470178 | -76.490143 |
| 42 | 115 | Susquehanna | 42,238 | 41.824642 | -75.771015 |
| 42 | 117 | Tioga | 41,373 | 41.816944 | -77.208706 |
| 42 | 119 | Union | 41,624 | 40.974829 | -76.961916 |
| 42 | 121 | Venango | 57,565 | 41.406051 | -79.766293 |
| 42 | 123 | Warren | 43,863 | 41.849869 | -79.233944 |
| 42 | 125 | Washington | 202,897 | 40.200711 | -80.145510 |
| 42 | 127 | Wayne | 47,722 | 41.549163 | -75.304308 |
| 42 | 129 | Westmoreland | 369,993 | 40.339487 | -79.592597 |
| 42 | 131 | Wyoming | 28,080 | 41.537620 | -75.939802 |
| 42 | 133 | York | 381,751 | 39.940915 | -76.750347 |