| Name | Title | Court | County | Rate this Judge | Rating | # of Ratings |
| Hon. Peter O'Brien | Senior Judge |
Common Pleas
| Monroe |  | | 0 |
| Hon. William O'Donnell | Judge |
Magisterial District
| Butler | | | 0 |
| Hon. Kevin O'Donnell | Judge |
Magisterial District
| Butler | | | 0 |
| Hon. Daniel O'Donnell | Judge |
Magisterial District
| Luzerne | | | 0 |
| Hon. Joseph O'Keefe | Judge |
Common Pleas
| Philadelphia | | | 0 |
| Hon. David O'Leary | Judge |
Magisterial District
| Dauphin | | | 0 |
| Hon. Steven O'Neill | Judge |
Common Pleas
| Montgomery | | | 0 |
| Hon. Timothy P. O'Reilly | Senior Judge |
Common Pleas
| Allegheny | | | 0 |
| Hon. Lawrence O'Toole | Judge |
Common Pleas
| Allegheny | | | 0 |
| Hon. Jeffrey Oberdorf | Judge |
Magisterial District
| York | | | 0 |
| Hon. Mary Odem | Judge |
Magisterial District
| Mercer | | | 0 |
| Hon. Richard Olasz , Jr. | Judge |
Magisterial District
| Allegheny | | | 0 |
| Hon. Senior Judge J. Wesley Oler, Jr. | Senior Judge |
Commonwealth
| None | | | 0 |
| Hon. J. Wesley Oler, Jr. | Senior Judge |
Common Pleas
| Cumberland | | | 0 |
| Hon. Katherine Oliver | Judge |
Common Pleas
| Centre | | | 0 |
| Hon. Walter Olszewski | Judge |
Common Pleas
| Philadelphia | | 10.0 | 1 |
| Hon. John Olwert | Judge |
Magisterial District
| York | | | 0 |
| Hon. Richard Opiela | Judge |
Magisterial District
| Allegheny | | | 0 |
| Hon. Craig Ormsby | Judge |
Magisterial District
| Blair | | | 0 |
| Hon. Ann Osborne | Judge |
Common Pleas
| Delaware | | 3.3 | 1 |
| Hon. Tonya Osman | Judge |
Magisterial District
| Bedford | | | 0 |
| Hon. Stanley Ott | Judge |
Common Pleas
| Montgomery | | 9.0 | 1 |
| Hon. George Overton | Judge |
Common Pleas
| Philadelphia | | | 0 |
| Hon. James Owen | Judge |
Magisterial District
| Armstrong | | | 0 |