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SECURITY SQ

Post Office™
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6901 SECURITY BLVD
WINDSOR MILL, MD 21244-2412

Closed

Sunday

Closed

Monday

11:00 am - 1:00 pm

Tuesday

11:00 am - 1:00 pm

Wednesday

11:00 am - 1:00 pm

Thursday

11:00 am - 1:00 pm

Friday

11:00 am - 1:00 pm

Saturday

11:00 am - 1:00 pm

See More Hours

1-800-ASK-USPS® | 800-275-8777
Phone | 410-594-9284
TTY | 877-889-2457

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Services at the Security Sq Post Office

Service hours may vary. For all location services, see all hours.

  • Greeting Card Services
  • Domestic Money Orders
  • Inquiry Money Orders
  • Photo Appointments: Schedule an Appointment
  • Passport Walk-Ins
  • Duck Stamps
  • Retail Label Broker®
  • Priority Mail International®
  • There are no pickup services available at this location.
  • Call Referral
  • In-Person Proofing Basic

*These services require an appointment or invitation.

Retail

Mon-Fri 11:00 am-1:00 pm

Sat 11:00 am-1:00 pm

Sun Closed

Call Referral

Mon-Fri 11:00 am-1:00 pm

Sat 11:00 am-1:00 pm

Sun Closed

Last Collection

Mon-Fri 1:30 pm

Sat 1:30 pm

Sun Closed

Passport Walk-Ins

Mon-Fri 11:00 am-2:00 pm

Sat 11:00 am-2:00 pm

Sun Closed

PO Box™ Access

Mon-Fri 11:00 am-1:00 pm

Sat 11:00 am-1:00 pm

Sun Closed

WINDSOR MILL

2513 N ROLLING RD

WINDSOR MILL, MD 21244-9998

ELLICOTT CITY

3375 ELLICOTT CENTER DR

ELLICOTT CITY, MD 21043-9998

PIKESVILLE

1325 BEDFORD AVE

PIKESVILLE, MD 21282-9998

SECURITY SQ

6901 SECURITY BLVD

WINDSOR MILL, MD 21244-2412

WINDSOR MILL

2513 N ROLLING RD

WINDSOR MILL, MD 21244-9998

CATONSVILLE CARRIER ANNEX

700 GEIPE RD REAR

CATONSVILLE, MD 21228-9997

At This Location

Street Parking Available

For facility accessibility, please call the Post Office.
1-800-ASK-USPS® (800-275-8777)

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