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GUASTI

Post Office™
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323 N TURNER AVE
GUASTI, CA 91743-9001

Closed

Monday

8:30 am - 5:00 pm

Tuesday

8:30 am - 5:00 pm

Wednesday

8:30 am - 5:00 pm

Thursday

8:30 am - 5:00 pm

Friday

8:30 am - 5:00 pm

Saturday

Closed

Sunday

Closed

See More Hours

1-800-ASK-USPS® | 800-275-8777
Phone | 909-937-6749
TTY | 877-889-2457

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Services at the Guasti Post Office

Service hours may vary. For all location services, see all hours.

  • Domestic Money Orders
  • General Delivery
  • Retail Label Broker®
  • Priority Mail International®
  • PO Box™ Online
  • Pickup Accountable Mail
  • Pickup Hold Mail
  • Call Referral
  • In-Person Proofing Basic

*These services require an appointment or invitation.

Retail

Mon-Fri 8:30 am-5:00 pm

Sat Closed

Sun Closed

Call Referral

Mon-Fri 8:30 am-5:00 pm

Sat Closed

Sun Closed

Last Collection

Mon-Fri 5:00 pm

Sat Closed

Sun Closed

Passport Appointments 

Mon-Fri 8:30 am-12:30 pm, 1:00 pm-2:00 pm

Sat Closed

Sun Closed

Schedule an Appointment
Photo Appointments 

Mon-Fri 8:30 am-12:30 pm, 1:00 pm-2:00 pm

Sat Closed

Sun Closed

Schedule an Appointment
Passport Walk-Ins

Mon Closed

Tue-Thu 1:45 pm-2:45 pm

Fri Closed

Sat Closed

Sun Closed

Pickup Accountable Mail

Mon-Fri 8:30 am-5:00 pm

Sat Closed

Sun Closed

Pickup Hold Mail

Mon-Fri 8:30 am-5:00 pm

Sat Closed

Sun Closed

Pickup Notice Left Mail

Mon-Fri 8:30 am-5:00 pm

Sat Closed

Sun Closed

PO Box™ Access

Mon-Fri 8:30 am-5:00 pm

Sat 8:00 am-11:00 am

Sun Closed

PO Box™ Delivery

Mon-Fri 11:30 am

Sat 11:30 am

Sun Closed

ONTARIO

1555 E HOLT BLVD

ONTARIO, CA 91761-9998

CHINO

5375 WALNUT AVE

CHINO, CA 91708-9998

CLAREMONT

140 HARVARD AVE

CLAREMONT, CA 91711-9998

ONTARIO

1555 E HOLT BLVD

ONTARIO, CA 91761-9998

RANCHO CUCAMONGA

10950 ARROW RTE

RANCHO CUCAMONGA, CA 91729-9998

DOWNTOWN ONTARIO

123 W HOLT BLVD

ONTARIO, CA 91762-9998

At This Location

Lot Parking Available

For facility accessibility, please call the Post Office.
1-800-ASK-USPS® (800-275-8777)

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