USPS Location
- Williamsville
100 E Main St, Williamsville, IL 62693
217-566-3651
Bulk Mail Acceptance, Bulk Mail Account Balance, Bulk Mail New Permit, Business Reply Mail Account Balance, Business Reply Mail New Permit, General Delivery, Global Express Guaranteed, Money Orders (Domestic), Money Orders (Inquiry), Money Orders (International), PO Box Online, Pickup Accountable Mail, Pickup Hold Mail, Priority Mail International