Passport Application Services - Merrimac 110 School St Merrimac, WI 53561 Phone : (608) 493-2323 Business Category Passport Application Services Toll-Free           (800) ASK-USPS U S Government Of--post Offices Merrimac, WI 53561 Phone : (608) 493-2323 Business Category Post Offices Government Offices & Public Schools Post Office - Merrimac 110 School St Merrimac, WI 53561 Phone : (608) 493-2323 Business Category Post Offices Toll-Free           (800) ASK-USPS