Union County Pennsylvania Court Courts of Common Pleas Magisterial District Courts Courts of Common Pleas in Union County Union County Court of Common PleasUnion County Courthouse103 S Second St, Lewisburg, PA 17837Phone: 570-524-8751Fax: 570-524-8628 Magisterial District Courts in Union County Union County Magisterial District Court 17-3-01Union County Courthouse103 S Second St, Lewisburg, PA 17837Phone: 570-524-8656Fax: 570-524-8698 Union County Magisterial District Court 17-3-02Union County Government Services Building343 Chestnut St, #2, Mifflinburg, PA 17844Phone: 570-966-2886Fax: 570-966-6252