Clarkson Post Office

3720 Lake Rd, Clarkson, NY 14430

Contact Numbers:

Phone: 585-637-6726
TTY: 877-889-2457
Toll-Free: 1-800-Ask-USPS® (275-8777)

Retail Hours

Pickup Services Hours

Monday-Friday 10:00am - 1:00pm, 2:00pm - 5:00pm
Saturday 10:00am - 12:00pm
Sunday Closed

Lobby Hours

Monday-Friday 6:00am - 6:00pm
Saturday 8:30am - 12:30pm
Sunday Closed

PO Box Access Hours

Monday-Friday 6:00am - 6:00pm
Saturday 8:30am - 12:30pm
Sunday Closed

PO Box Delivery Time

Monday-Saturday 10:00am
Sunday Closed

Last Collection Times

Monday-Friday 5:00pm
Saturday 12:00pm
Sunday Closed

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

  • Business Reply Mail Account Balance
  • Business Reply Mail New Permit
  • Duck Stamps
  • General Delivery
  • Money Orders (Domestic)
  • Money Orders (Inquiry)
  • Money Orders (International)
  • Pickup Accountable Mail
  • Pickup Hold Mail
  • PO Box Online
  • Priority Mail International®

Visit our Links Page for Change of Address, Hold Mail/Stop Delivery, PO Boxes™ rentals and fees, Rates on Postage Stamps and Freight/Shipping, Holidays, Bulk Mail, Money Orders, and Available Jobs.

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

Nearby Post Offices:

14 Main St
0.8 mile away

133 Railroad Ave
2.9 miles away

Adams Basin
4303 Canal Rd
3.3 miles away

5 Wright St
3.9 miles away


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Time of operation is wrong .. It's wrong on the site and it's wrong on the door to the office itself


Maybe try leaving the correct time then to let everyone know? :)
• Replied to Mr.mad

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