Triangle Post Office

18627 Old Triangle Rd, Triangle, VA 22172

Contact Numbers

Phone: 703-221-9546
Fax: 703-221-8286
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours

Lobby Hours
PO Box Access Available

Monday 24 hours
Tuesday 24 hours
Wednesday 24 hours
Thursday 24 hours
Friday 24 hours
Saturday 24 hours
Sunday 24 hours

Last Collection Times

Monday 5:00pm
Tuesday 5:00pm
Wednesday 5:00pm
Thursday 5:00pm
Friday 5:00pm
Saturday 2:00pm
Sunday Closed

*This facility does not process US Passports applications or renewals. Check nearby locations below.

  • Burial Flags
  • Business Line
  • Business Reply Mail Account Balance
  • Business Reply Mail New Permit
  • Duck Stamps
  • General Delivery
  • Money Orders (Domestic)
  • Money Orders (Inquiry)
  • Money Orders (International)
  • Packaged Stamps
  • Pickup Accountable Mail
  • Pickup Hold Mail
  • PO Box Online
  • Lot Parking

Visit our Links Page for Holiday Schedule, Change of Address, Hold Mail/Stop Delivery, PO Box rentals and fees, and Available Jobs.

*Please call to verify information. Is anything incorrect? Let us know here

Nearby Post Offices:

17949 Main St
0.7 mile away

400 5th Ave
1.9 miles away

Prince William
3360 Post Office Rd
4.3 miles away

Dumfries Annex
3360 Post Office Rd
4.3 miles away


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The mail service is horrible. They always come up with an excuse for why they weren't able to deliver my packages when some things can go inside mailbox. I usually don't have a problem but lately it has been an issue and it is really getting annoying


Usually I have a great experience with USPS but today not so much. Came home to find a package stuffed inside my mailbox to the point that it took 10 minutes to get it out. Luckily nothing was broken.


I shipped a package on May 4th and intercepted it on May 5th and it STILL has NOT delivered. I paid $19.95 to do this - NOT HAPPY!

* is not a part of, or affiliated with, the official United States Postal Service (USPS).