Daniel L Cosgrave (Postmaster)
daniel.l.cosgrave@usps.gov
204 S Broad St
Lancaster, OH 43130
Lancaster, OH 43130
The Lancaster Post Office is located in the state of Ohio within Fairfield County. This location serves 59,570 Lancaster residents with a median income of $44,571. It's estimated that approximately 95,080 packages pass through this post office each year.