United States Postal Service (Lewiston) Share: Business ServicesGovernment United States Postal Service (Lewiston) Visit Website 1613 Idaho St. Lewiston, ID 83501 (208) 798-4929 (208) 746-8868 (fax) Hours: Monday-Friday 7:30am-5:15pm Saturdays 8:00-12:00pm About About We are more than 500,000 employees delivering to 160 billion pcs of mail and the only organization in the country that has the resources, network, infrastructure and logical capacity to deliver