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: 
  • Telephone numbers: 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 through the use of the MPO’s standard metered system.

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

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

  • The MPO requires a minimum of 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?

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.