Cynthia S Obrien (Postmaster)
cynthia.s.obrien@usps.gov
101 W High St
Mount Vernon, OH 43050
Mount Vernon, OH 43050
The Mount Vernon Post Office is located in the state of Ohio within Knox County. This location serves 29,050 Mount Vernon residents with a median income of $42,251. It's estimated that approximately 46,367 packages pass through this post office each year.