Mazon Post Office

600 Depot St, Mazon, IL 60444

Contact Numbers

Phone: 815-448-5697
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours







Lobby Hours
PO Box Access Available

Monday 24 hours
Tuesday 24 hours
Wednesday 24 hours
Thursday 24 hours
Friday 24 hours
Saturday 24 hours
Sunday 24 hours

Last Collection Times

Monday 4:30pm
Tuesday 4:30pm
Wednesday 4:30pm
Thursday 4:30pm
Friday 4:30pm
Saturday 11:30am
Sunday Closed

Bulk Mail Acceptance Hours

Monday 9:00am - 11:30am, 12:30pm - 4:00pm
Tuesday 9:00am - 11:30am, 12:30pm - 4:00pm
Wednesday 9:00am - 11:30am, 12:30pm - 4:00pm
Thursday 9:00am - 11:30am, 12:30pm - 4:00pm
Friday 9:00am - 11:30am, 12:30pm - 4:00pm
Saturday Closed
Sunday Closed

  • Visit our Passport FAQ page for a complete overview of what to bring, what you need to know, and how long it will take.
  • You will need two forms of Identification with copies.
  • A passport quality photo. Photo service available at location.
  • The appropriate application form printed and filled out, and the required fee for applying or renewing.
  • You can find up to date costs, information, and forms at the State Departments Travel Site

We provide you with the contact details of the Mazon Post Office, including its address, phone number and retail hours. This way, you will be able to ask for assistance with USPS shipping and mail services, either by phone or in person.

If you visit the Mazon Post Office, please tell us about your experience. It can be helpful to others looking for USPS customer service.

Don't forget to take a look at our FAQ section. It may help you clarify some doubts before contacting your local post office.

Services offered at this location:

  • Bulk Mail Acceptance
  • Bulk Mail Account Balance
  • Bulk Mail New Permit
  • Business Line
  • Business Reply Mail Account Balance
  • Business Reply Mail New Permit
  • Duck Stamps
  • General Delivery
  • Money Orders (Domestic)
  • Money Orders (Inquiry)
  • Packaged Stamps
  • Passport Acceptance
  • Passport Photo
  • Philatelic Services
  • Pickup Accountable Mail
  • Pickup Hold Mail
  • PO Box Online
  • Lot Parking

Frequently Ask Questions at Mazon Post Office

  • Where can I find my USPS tracking number?

    You can find your tracking number on your sales receipt, self-service kiosk eReceipt, mailing receipt, online label record or below the barcode placed on the mailed item.

  • What if I lose my tracking number?

    Local Post Offices do not have a way to recover a lost tracking number. If the recipient is a current Informed Delivery subscriber, they will be able to see the tracking number on their dashboard.

  • How long will USPS forward mail?

    If your move is temporary, USPS can forward your mail from your old address to a new one for 15 days to one year.

  • How to request USP hold mail?

    Sing in to your USPS account and check if hold mail service is available for your address. If it is, choose the dates for your hold mail request. Remember that it must be for a minimum of 3 days and a maximum of 30 days. If you need USPS mail hold for more than 30 days, you must sign up for forwarding service. For permanent move, you must change your address with the USPS.

  • How to request a USPS address change?

    You can request a USPS change of address online or by filling out the PS Form 3575 acquired from your local Post Office. Please note that when your request is made online there is a $1.05 identity validation fee.

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