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Visit your local Post Office™ at 300 Mill St to find everything you need to send mail and ship packages. Explore our other products and services like money orders, Post Office™ boxes, passports, gift cards, and more
your carrier on 1300 block of 10th Street on 12/31/25 had tore off a sign on my HOUSE which they aren't allowed to touch because it's not on the box itself. i have signs on 2 spots on mailbox stating ONLY then the names of mail for actual residents of house (mind you they are 2 short names, not like i put 10 different names to wade through) as instructed by usps and my previous carrier before he left the route 4 years ago. still receive wrong mail after talking several times to carriers. then this other person not original to my route ripped my sign saying ONLY because the first 2 didn't clearly work. you can't touch my house!!! I'm calling corporate offices
JC
Jwl Clark
Dec 16, 2025
1.0
Workers are extremely rude and it’s almost impossible to get someone on the phone .
JP
Jude Peterson
Sep 2, 2025
5.0
One of the best post offices i have ever dealt with. Whenever i call i get directed straight to the actual post office and not halfway across the world to talk to someone in a different country. Dude who answered held my package and i was able to pick it up as soon as it arrived. These people are great at what they do!
BC
Britney Chambers
Sep 28, 2023
5.0
I came all the way from Rockford to go to this location in Beloit to get my passport, & let me just tell you very professional, polite, A Lady name sommer helped me she was amazing great customer service I was in & out within 10 minutes.
SD
Shawn Dressler
Mar 29, 2023
1.0
been struggling for a month with a forwarding request
Frequently Asked Questions About United States Postal Service
Can I get a passport application at this Post Office?
Yes, Thousands of Post Offices™ accept first-time passport applications for the U.S. Department of State. Most of those locations can also take your passport photo. Please complete and print your passport application form before you apply.
Is an appointment needed for passport services?
Most Post Offices that offer passport services have set hours, and you'll need to schedule an appointment using our online scheduler. We also offer limited Passport walk-in hours at select locations.
Does this location take the photo needed for passports?
For first-time passport and photo services, please make an appointment using our online scheduler.
What is the cost to take a passport photo?
The current fee for a passport photo at USPS is $15.
When does this location do walk-in passports?
We offer limited Passport walk-in hours at select locations.
Can I get a PO Box online?
Yes, you can search for available PO Boxes and reserve one online at https://www.usps.com/manage/po-boxes.htm. The process is quick and secure, and you'll receive instructions for completing your setup in person.
How much is a small PO Box?
PO Box prices vary by location. You can check exact pricing for your area by visiting https://www.usps.com/manage/po-boxes.htm and entering your ZIP Code.
Can you get to the PO Boxes in the lobby after hours?
Most USPS locations offer 24/7 access to PO Boxes in the lobby. Access hours may vary by location, so check with your local Post Office for specific lobby hours.
How can I get a PO Box?
You can apply for a PO Box online or in person at your local Post Office. Just bring two valid forms of ID and your completed application if applying in person. To start online, visit https://www.usps.com/manage/po-boxes.htm.
What time can I check my PO Box weekly and on weekends?
You can check your PO Box during lobby hours, which often include extended hours or 24/7 access. Weekend access may vary. Check with your local Post Office for exact times.
What services are available at the United States Postal Service located at 300 Mill St, Beloit?
You can send mail, ship packages, purchase money orders, rent PO Boxes, apply for passports, buy gift cards, and more at this location.
Can I apply for a first-time U.S. passport at this post office?
Yes, this post office accepts first-time passport applications. Many locations also offer passport photo services by appointment.
Do I need an appointment to access passport services here?
Yes, most passport services require scheduling an appointment online, though limited walk-in hours may be offered at select locations.
What are the operating hours for this USPS location?
Monday through Friday, it is open 9:00 AM to 6:00 PM; Saturdays from 9:30 AM to 12:30 PM; it is closed on Sundays.
How can I get a PO Box at the Beloit post office?
You can apply for a PO Box online or in person by bringing two valid IDs and a completed application. Availability and prices vary by location.
Are PO Boxes accessible after regular business hours?
Most USPS locations offer 24/7 lobby access to PO Boxes, but it is best to confirm specific lobby hours with this location.
What nearby places can help me find or plan a visit to the United States Postal Service at 300 Mill St?
Nearby landmarks such as Post Office-Beloit, US Post Office, and Beloit City Hall can help orient you when visiting this USPS location.
What recreational or fitness centers are near the Beloit USPS?
Places like Beloit Barbell gym, Crossfit, and Pure Gravity Fitness yoga studio offer recreation and exercise options close to the post office.
Are there any real estate services close to the USPS in Beloit?
Yes, nearby you can find real estate agents and offices such as Casey Bellard, Colin Schindler Real Estate, Schindler Home Team, and RE/MAX Ignite.
Where can I find additional USPS resources or schedule services online?
You can schedule services and find resources through the USPS website and the provided online scheduler links.