Today
Today's opening hours
This week's opening hours
Retail
- Monday 8:30 am to 5:00 pm
- Tuesday 8:30 am to 5:00 pm
- Wednesday 8:30 am to 5:00 pm
- Thursday 8:30 am to 5:00 pm
- Friday 8:30 am to 5:00 pm
- Saturday 9:00 am to 12:30 pm
- Sunday Closed
Other opening hours
Bulk Mail Acceptance
- Monday to Friday
- 9:30 am to 12:00 pm, 1:00 pm to 4:00 pm
- Saturday and Sunday
- Closed
Call Referral
- Monday to Friday
- 8:30 am to 5:00 pm
- Saturday
- 9:00 am to 12:30 pm
- Sunday
- Closed
Lobby
- Monday to Sunday
- 5:00 am to 8:00 pm
Pickup Services
- Monday to Friday
- 8:45 am to 5:00 pm
- Saturday
- 9:00 am to 12:30 pm
- Sunday
- Closed
PO Box Access
- Monday to Sunday
- 5:00 am to 8:00 pm
Opening hours updated on 11/07/2026
Report a changeThis Post Office at a glance
Opening hours of USPS Post Office San Mateo: Monday to Friday from 8:30 am to 5:00 pm, Saturday from 9:00 am to 12:30 pm; closed Sunday.
- Opening hours a week
- 46h
- Opening hours a week
- Days open, Monday to Saturday
- 6/7
- Days open, Monday to Saturday
- Earliest opening, Monday to Friday
- 8:30 am
- Earliest opening, Monday to Friday
- Latest closing, Monday to Friday
- 5:00 pm
- Latest closing, Monday to Friday
- Open all day
- No break
- Open all day
Special days ahead
Public holidays, closures and special opening hours over the next two months.
- Wednesday, November 11 Veterans Day Opening hours not confirmed
- Thursday, November 26 Thanksgiving Day Opening hours not confirmed
- Friday, December 25 Christmas Opening hours not confirmed
- Friday, January 1 New Year’s Day Opening hours not confirmed
Services
Services Available: 15
Parking 1
Contacts 4
Last Collection 6
Sending from this Post Office
- First-Class Mail from From $0.65 up to Postcards
- Shipping Services from From $7.90 up to USPS Ground Advantage (2–5 days)
Indicative rates subject to change by the postal operator.
- Open
- Closing soon
- Closed
- Opening hours not confirmed
- This address
Practical information
- Type
- Post OfficeA United States Postal Service Post Office: stamps, sending and collecting letters and packages, and the USPS counter services.
- Address
- 1630 S Delaware St, 94402 San Mateo
- State
- California
- Official website
- usps.com
Good to know
USPS Post Office San Mateo is in San Mateo, at 1630 S Delaware St. It opens 6 days a week, Saturday included.
When it is closed, the nearest other offices are USPS Post Office 25th Avenue - San Mateo (0.9 mi) and USPS Post Office Saint Matthew - San Mateo (1.1 mi).
The next public holiday is Veterans Day, Wednesday, November 11. Opening hours often change that day: check them before you go.
Frequently asked questions
Is USPS Post Office San Mateo open on Saturday?
Yes It is open on Saturday from 9:00 am to 12:30 pm.
Is USPS Post Office San Mateo open on Sunday?
No It is closed on Sunday.
What time does USPS Post Office San Mateo close?
It closes Monday to Friday at 5:00 pm and Saturday at 12:30 pm.
Is there a cash machine?
This Post Office does not list a cash machine.