Post Office

United States Postal Service Contract Postal Unit


Monday -Wednesday
8:30 am - 12 pm 

Payment Methods:

Cash and Check ONLY

NO Credit or Debit Cards

Domestic Services:

First Class Letters and Parcels (under 13 ounces) - 2 to 3 business day shipping time

Standard Post Parcels (over 13 ounces) - 7 to 10 business day shipping time

Priority Mail (regular and flat rate) - 2 to 3 business day shipping time

Media Mail - up to 3 weeks

Tracking Numbers

Certified Mail

Return Receipt


International Services:

First Class Letters (up to 13 ounces) - 4 to 6 business day shipping time

NO International parcels or packages

Contact Information:

Atherton Contract Postal Unit


150 Watkins Avenue (temporary trailers)
Atherton, CA 94027

Menlo Park Main Post Office - Bohannon

(Delivery Post Office to Atherton Residents)


fax: 650-323-4027

3875 Bohannon Drive
Menlo Park, CA 94025

Menlo Park Main Post Office - Oak Grove


655 Oak Grove Avenue
Menlo Park, CA 94025