Municipal Post Office (MPO)
Frequently Asked Questions and Answers


1.       Where is the MPO located?                

The MPO is located at 100 Guilford Ave., Baltimore, MD 21202
              (across from the rear of the City Hall building).

2.        What are the MPO Hours of Operation?

 7:30 am – 5:00 pm (M-F)

 3.       Does the MPO close for lunch?     

Yes, between 12 pm – 1 pm, daily

 4.       How can you contact MPO?   

 Email Us:  or  Telephone Us: 410- 545- 3007, 410- 396-3423

 5.       What type of mailing services does the MPO offer?

The MPO Processes incoming and outgoing US mail, including parcels, packages, and interdepartmental mail for Baltimore City agencies and related locations that house City services.

The MPO also processes special mail designation requests for agencies including registered mail, special delivery mail,              certified mail, and express mail. The MPO handles the Insertions and Presorting of notices and bills.

6.     When is an agency charged for postage services?

An agency is charged at the end of each month for accumulated postage incurred using the MPO’s standard metered system.

7.    How can an agency request a change of address?

The agency head can send us an email to request a change of address.

8.    How much time does the MPO require to process large/bulk mailings?

The MPO requires 24 hours to process large/bulk mailings. A large/bulk mailing is considered five thousand pieces or more.

9.   How can an agency request the daily delivery service?   

The agency head can send us an email to request the daily delivery services.

10. I want to send mail to a City agency. What is the best method?         

Interdepartmental mail is the best method.

Mail is picked up/delivered twice daily, 10 am and 2 pm, M – F.

USPS mail should be completed by 2 pm to be sent out the same day.

You can also contact the MPO to schedule a special request pickup for a specific time.