Mason City Post Office

211 N Delaware Ave Ste 100, Mason City, IA 50401

Contact Numbers

Phone: 641-423-5231
Fax: 641-423-6918
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 6:00pm
Tuesday 6:00pm
Wednesday 6:00pm
Thursday 6:00pm
Friday 6:00pm
Saturday 6:00pm
Sunday Closed

Passport Appointment Hours*

Monday 8:30am - 12:30pm, 2:00pm - 3:30pm
Tuesday 8:30am - 12:30pm, 2:00pm - 3:30pm
Wednesday 8:30am - 12:30pm, 2:00pm - 3:30pm
Thursday 8:30am - 12:30pm, 2:00pm - 3:30pm
Friday 8:30am - 12:30pm, 2:00pm - 3:30pm
Saturday 8:30am - 10:30am
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. 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

*An appointment is required to apply for or renew US Passports. Please Call or schedule online.

Bulk Mail Acceptance Hours

Monday 11:00am - 4:00pm
Tuesday 11:00am - 4:00pm
Wednesday 11:00am - 4:00pm
Thursday 11:00am - 4:00pm
Friday 11:00am - 4:00pm
Saturday Closed
Sunday Closed

  • Bulk Mail Acceptance
  • Bulk Mail Account Balance
  • Bulk Mail New Permit
  • Burial Flags
  • Business Line
  • Business Reply Mail Account Balance
  • Business Reply Mail New Permit
  • Duck Stamps
  • General Delivery
  • Money Orders (Domestic)
  • Money Orders (Inquiry)
  • Money Orders (International)
  • Packaged Stamps
  • Passport Acceptance
  • Passport Photo
  • Pickup Accountable Mail
  • Pickup Hold Mail
  • PO Box Online
  • Street Parking
  • Passport Appointment Hours

Visit our Links Page for Holiday Schedule, Change of Address, Hold Mail/Stop Delivery, PO Box rentals and fees, and Available Jobs.

*Please call to verify information. Is anything incorrect? Let us know here

Nearby Post Offices:

502 Main St
4.8 miles away

110 E Main St
5.3 miles away

313 Main St E
6.8 miles away

Clear Lake
410 1st Ave N
7.3 miles away


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I’ve never been more disappointed with my mail service in my life we have no permanent carrier I have packages that will say out for delivery that day that never come that day, I watched my house get skipped and when I asked where’s mine he blatantly ignored me. I would like to receive my mail before 5:30 or later can’t even get mail during business hours and then I’m receiving mail that isn’t mine and my neighbors have to exchange with me. Please get some kind of consistancey since you raise prices of everything and give terrible service I live in mason city Iowa 50401 and this is rediculous


1 star! I’ve tried to call them for days and no answer! Anyone work there?


Sent out priority mail flat rate 2to 3 day in 6/10/2023 it's know 20th. From mason city to de moins it said delivery on 12 by 9 pm. Then at 9 it says in transit late delivery suck there and it know 20th I filed missing mail report. Think they will find it? don't mail anything very often


I had two packages that were to arrive today. I received notification that the mailbox was full thus were not left. These items are too large to fit in a mailbox. Please reach out to me and let me know how. I do not understand why they were not brought to my door like all other packages that did not fit in my mailbox. Please let me know.


A present I sent to Chris VanDeventer at 95 SunnyCircle, Mason City, iowa 50401. They recently moved to Mason City. I sent a Chime and it was supposedly delivered 11/17. Can you help me see if it was indeed delivered and to the correct address? Thank you. Diane, Thanks for contacting us. Here is the tracking for the package and it shows it was delivered to the mailbox on 11/17. Has the recipient checked all around their house in case it was placed somewhere other than the mailbox, checked with other family members in case it was intercepted by one of them and checked with close by neighbors to see if it was misdelivered? If so, please ask them to take this tracking number to the local post office and see if the postmaster can assist in case the package actually wasn't delivered and is sitting somewhere. The tracking is 9405511206207819992534. Please let us know if you have any further questions or concerns. Ticket Number: 122863. Please use this ticket number in any email correspondence with us. Best Regards, Christie


Just wanted to compiment my postman today, I live on 22nd SW out in West Haven, and what a pleasant young man. He just made my day with his cheerfulness and manners, great job!!!


Hi. I’m Shen. My package total 5 ,I mailed from Japan to the United States. CD378114180JP CD378114159JP CD378114176JP CD378114162JP CD378114193JP But ,Only No CD378114159JP has not arrived yet. Please check and reply me email. thank you.


I currently have a PO box with the post office for going on 2 years & running. Usually pretty helpful. No major issues really as of yet other than their jenky pick up boxes for packages too large for my box. Can't ever find which box is which. My boyfriend just walked in & couldn't find 1716. So here I sit without my package.The keys hardly work & you gotta wait for an employee to mess with it when they have time. Would be nice if they had a sort of legend or map showing where each box is. My BIGGEST complaint would be the lack of handicapped accessable doors. I saw an elderly gentleman in a wheelchair struggling to get inside. I helped him but couldn't believe there wasn't a handicapped button. I hope they change that.


I called the post office and spoke to a Dan in to attempt to arrange pick up of a package. My work hours are such that I cant get their during office hours and the package is large enough that it doesnt fit in the lobby boxes. This worker had no interest in helping me find a solution and was only interested in arguing. Told me to go to the window and push the doorbell. Well, no one ever answers that. Ive known that for years but his comment was "They do when Im there." Sooooooo unhelpful. He must be miserable at his job!!! Come on Dan its a people person job!

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