Gary K Derowitsch (Postmaster)
gary.k.derowitsch@usps.gov
437 Clay St E
Monmouth, OR 97361
Monmouth, OR 97361
The Monmouth Post Office is located in the state of Oregon within Polk County. This location serves 11,258 Monmouth residents with a median income of $37,173. It's estimated that approximately 17,969 packages pass through this post office each year.