Post Offices in Cass County, Iowa

Find Cass County, Iowa post offices and USPS mailing boxes. Post offices provide information on bulk mail services, domestic mail delivery, international shipping, change of address, mail forwarding, PO boxes, and passport services.


Anita Post Office 906 Main Street Anita, IA

Atlantic Post Office 20 East 5th Street Atlantic, IA

Cumberland Post Office 123 Main Street Cumberland, IA

Griswold Post Office 608 4th Street Griswold, IA

Lewis Post Office 501 Main Street Lewis, IA

Marne Post Office 202 Washington Street Marne, IA

Massena Post Office 99 Main Street Massena, IA

Wiota Post Office 405 Pioneer Avenue Wiota, IA

About Cass County Post Offices

Cass County Post Offices are branch locations of the customer service postal facilities of the United States Postal Service (USPS) in Cass County, IA. The USPS is an independent agency of the federal government that provides mail and package delivery services to all states and territories. Cass County post offices are supported entirely by revenues generated by their own operations. Operational authority over the USPS lies with a Board of Governors and rate setting authority falls under the Postal Rate Commission.

You may contact the Post Office for questions about:
  • Cass County Post Office hours and locations
  • Mail and package delivery services
  • Cass County PO Box services
  • Passport applications and renewals
  • Cass County Post Office jobs and employment
USPS Mail Services

The USPS uses a vast network of Post Offices, Processing and Distribution Centers, Priority Mail Processing Centers, Air Mail Centers, and Bulk Mail Centers to sort, process, distribute, and deliver mail. Cass County Post Offices serve as one of the primary points of customer contact in the mail delivery process.

Cass County Mail Delivery Services

Post Offices in Cass County accept mail and packages from senders, offering a range of mailing and pricing options. The most common form of mail delivery, and one for which the Cass County USPS has a legal monopoly, is residential first-class mail. First-class mail is designed for envelopes and lightweight packages, and it provides delivery to any location in the U.S. at a flat rate of one first-class mail stamp. Multiple other mailing options are available for letters and packages of any size. Priority mail options provide faster delivery at a higher cost than first-class mail. Cass County Post Offices sell stamps, shipping supplies, and certain collectors' and gift items. Customers can also choose Registered, Certified, and Return Receipt mail for varying degrees of verification of an item's delivery. Post Offices also sell money orders. Shipping and customs forms are also available at Cass County Post Offices.

Cass County PO Boxes

Businesses and residential customers can also use the Post Office to receive their mail instead of choosing delivery to their door. Post Office Boxes, also called P.O. Boxes, are available for rent in multiple sizes for a monthly rental fee.

Cass County Passport Applications & Renewals

The Cass County Post Office provides passport services. Passport services in Cass County may include help with renewing passports, applying for a new passport, changing names on a passport, and processing expedited passport services. Passport acceptance services provided by Cass County Post Offices often require having a scheduled appointment.