United States Government--post Office, Idaho, Clifton Dayton, ID 83232 Phone : (208) 747-3200 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools Post Office - Clifton 30 S Main Hwy Clifton, ID 83228 Phone : (208) 747-3200 Post Office - Clifton Business Category Post Offices Toll-Free           (800) ASK-USPS United States Postal Service , Phone : (208) 747-3200 United States Postal Service Business Category