Post Offices in Sioux County, Iowa

Find Sioux 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.


Alton Post Office 1022 3rd Avenue Alton, IA

Boyden Post Office 911 Main Street Boyden, IA

Granville Post Office 839 Broad Street Granville, IA

Hawarden Post Office 900 Central Avenue Hawarden, IA

Hospers Post Office 202 Main Street Hospers, IA

Hull Post Office 1204 Main Street Hull, IA

Ireton Post Office 320 Main Street Ireton, IA

Maurice Post Office 410 2nd Street Maurice, IA

Orange City Post Office 108 Albany Avenue Southeast Orange, IA

Rock Valley Post Office 1501 Main Street Rock Valley, IA

Sioux Center Post Office 100 North Main Avenue Sioux Center, IA

About Sioux County Post Offices

Sioux County Post Offices are branch locations of the customer service postal facilities of the United States Postal Service (USPS) in Sioux County, IA. The USPS is an independent agency of the federal government that provides mail and package delivery services to all states and territories. Sioux 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:
  • Sioux County Post Office hours and locations
  • Mail and package delivery services
  • Sioux County PO Box services
  • Passport applications and renewals
  • Sioux 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. Sioux County Post Offices serve as one of the primary points of customer contact in the mail delivery process.

Sioux County Mail Delivery Services

Post Offices in Sioux 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 Sioux 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. Sioux 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 Sioux County Post Offices.

Sioux 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.

Sioux County Passport Applications & Renewals

The Sioux County Post Office provides passport services. Passport services in Sioux 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 Sioux County Post Offices often require having a scheduled appointment.