USPS Location
- Allendale
304 E Main St, Allendale, IL 62410
618-299-5151
Bulk Mail Acceptance, Bulk Mail Account Balance, Business Line, Business Reply Mail Account Balance, Duck Stamps, General Delivery, Money Orders (Domestic), Money Orders (Inquiry), Money Orders (International), PO Box Online, Packaged Stamps, Pickup Accountable Mail, Pickup Hold Mail, Priority Mail International