Guilderland Post Office

11 New Karner Rd, Guilderland, NY 12084

Contact Numbers

Phone: 518-456-1400
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 5:15pm
Tuesday 5:15pm
Wednesday 5:15pm
Thursday 5:15pm
Friday 5:15pm
Saturday 1:45pm
Sunday Closed

Bulk Mail Acceptance Hours

Monday 9:00am - 3:00pm
Tuesday 9:00am - 3:00pm
Wednesday 9:00am - 3:00pm
Thursday 9:00am - 3:00pm
Friday 9:00am - 3:00pm
Saturday Closed
Sunday Closed

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

  • Bulk Mail Acceptance
  • Bulk Mail Account Balance
  • Bulk Mail New Permit
  • 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
  • Sure Money
  • 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:

30 Karner Rd
1.9 miles away

Stuyvesant Plaza
1475 Western Ave Ste 51
1.9 miles away

45 Voorheesville Ave
2.5 miles away

1399 New Scotland Rd
2.8 miles away


*Comments below are not read by postal employees. Please do not post personal information.

*By clicking Submit, you agree to our Privacy Policy & Terms of Use.


A package was left in my mailbox on Saturday and I was in the shower. There was mail in the mailbox later but the carton of cigarettes and a pack of cigarettes were gone. A friend of mine had them in a bag because it was raining. The mail carrier at the Rensselaer Post office must taken them by mistake. I called the Rensselaer Post Office and I was told that the cigarettes went to the mail facility on New Karner Road and we would not be able get them back. Sincerely Judy LeFavour m


Today I received my Master Card bill with the envelope deliberately opened. I know it wasn't opened by anyone in my home. I am concerned about someone stealing financial information for fraudulent purposes.

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