Passport Application Services - Elsah 48 Mill St Elsah, IL 62028 Phone : (618) 374-2491 Business Category Passport Application Services Toll-Free           (800) ASK-USPS Post Office - Elsah 48 Mill St Elsah, IL 62028 Phone : (618) 374-2491 Post Office - Elsah Business Category Post Offices Toll-Free           (800) ASK-USPS United States Government--post Offices, Elsah Ofc 48 Mill Alton, IL 62002 Phone : (618) 374-2491 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools