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Visit your local Post Office™ at 300 Millburn Ave 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
Highly difficult staff. Was told to use a marker to write an address then told the marker made the label too big. Had to purchase a label get back in line to resend the package and then the male staff member was rude, wouldn’t look at me, clicked the satisfied button for me. I told him I was unsatisfied and wanted to go back to change his selection. Then he told me to do so I’d have to get back in line.
Rude, highly unprofessional, and very underhanded. Will not be using this office again. Not worth the aggravation
FP
Frank Perdotti
Dec 15, 2025
1.0
The Millburn post office is consistently rude and disrespectful to customers. Staff act annoyed by basic questions and treat people like an inconvenience instead of providing help. Easily one of the worst customer service experiences I’ve had. The young African American lady at the counter is just the meanest, most rude individual I’ve encountered in a very long time. Awful individual.
YL
Y Li
Dec 13, 2025
1.0
If I could give a zero, I will! I came in 10 mins before they close and a African American lady won’t let me to buy the stamps which may take her only 1min to be done! Horrible! Plus this is for Christmas cards which timing is really important. Please hire someone who is eager to work here instead of someone why wants to leave before the closing time.
RD
Rosine Davies
Dec 10, 2025
5.0
The young clerk even helped me with a problem I encountered at the South Orange post office.
NG
Neil Guth
Nov 30, 2025
1.0
Simply awful.
Vincent B. 100% agree.
That woman you speak of is a horrible human being.
Also this past August, the MB Post office lost 13 days of mail and looked for as many excuses as possible to not own up to it.
I had proof from the Kearney Distro center as I get daily email notifying me with pictures of the mail I am receiving daily.
I never got an apology and I never got the 13 days of mail. I guess a Gremlin ate it.
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 Millburn Ave?
At 300 Millburn Ave, you can send mail and packages, purchase money orders, rent Post Office boxes, apply for passports, buy gift cards, and access other postal services.
Can I apply for a first-time U.S. passport at this Post Office?
Yes, this Post Office accepts first-time U.S. passport applications and can take your passport photo by appointment. Please complete and print your passport application before applying.
Do I need an appointment for passport services at this location?
Most passport services require an appointment via the online scheduler, although limited walk-in hours are available at select locations.
What are the operating hours of the United States Postal Service at 300 Millburn Ave?
Monday through Friday, the Post Office is open from 9:00 AM to 4:30 PM, Saturdays from 9:00 AM to 12:00 PM, and closed on Sundays.
Is it possible to get a PO Box online for this Post Office?
Yes, you can search and reserve PO Boxes online at the USPS website, and complete the setup in person at the Post Office.
Are PO Boxes accessible after normal lobby hours at this Post Office?
Most USPS locations, including this one, offer 24/7 lobby access to PO Boxes, but hours can vary, so checking with this location is recommended.
What nearby businesses can I visit before or after my visit to the Post Office at 300 Millburn Ave?
Nearby you can find establishments such as Oxford Jewelers for shopping, Gian Marco - Millburn for Italian dining, and F45 Training gym for fitness activities, making it convenient to combine errands or leisure.
Are there other postal or shipping services near the United States Postal Service at 300 Millburn Ave?
Yes, The UPS Store 7507 and another United States Postal Service location are nearby, providing additional options for shipping and packing supplies.
How can the nearby Cheapo Flight Alerts travel services benefit Post Office customers?
Customers planning international travel can visit Cheapo Flight Alerts nearby for travel deals and then conveniently obtain passports or mail travel documents at the Post Office.
What are the contact options if I need to reach the United States Postal Service at 300 Millburn Ave?
You can call the local phone number +1 973-376-2966 or the main USPS phone number +1 800-275-8777 for assistance.