Joseph Haschak (Postmaster)
joseph.r.haschak@usps.gov
111 Mansfield St
Belvidere, NJ 07823
Belvidere, NJ 07823
The Belvidere Post Office is located in the state of New Jersey within Warren County. This location serves 7,571 Belvidere residents with a median income of $54,205. It's estimated that approximately 12,084 packages pass through this post office each year.