On November 29, 1852, the Lycoming County Court of Common Pleas granted a charter to the "English Evangelical Lutheran Church of Williamsport." The Charter was recorded by hand in a volume, still held in church archives.
The charter was amended on February 15, 1864 to permit encumbrance for the building or repairing of the church edifice.
On April 10, 1871, Judge Gamble allowed the church to connect itself with the "German Evangelical Lutheran Ministerium of Pa and Adjacent States" (commonly known as the Pennsylvania Synod).
A charter amendment of July 6, 1892 changed the name to "St. Mark's English Evangelical Lutheran Church of Williamsport, Pa." and provided for conduct of church affairs by a council of three Trustees, four Elders and four Deacons, and the Pastor.