Ontario, CA Post Offices Hours and Locations

‘Post Offices’ near Ontario, CA - Hours & Locations

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Locations currently open are Green and those currently closed are Red.
As of:7:16 pm (PDT) Wed Jun 10, 2026. [Change]

1. Post Office - Alta Loma
Post Offices

6649 Amethyst Ave
Rancho Cucamonga, CA 91701
California
(909)987-0785
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Hours — Wed: 8:30am-5:00pm
2. Post Office - Anaheim Hills
Post Offices

5505 E Santa Ana Canyon Rd
Anaheim, CA 92817
California
(714)921-2304
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Hours — Wed: 9:00am-5:00pm
3. Post Office - Atwood
Post Offices

1679 E Orangethorpe Ave
Atwood, CA 92811
California
(714)528-2414
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Hours — Wed: 8:30am-4:30pm
4. Post Office - B & B Pharmacy
Post Offices

18525 Yorba Linda Blvd
Yorba Linda, CA 92886
California
(714)777-2737
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Hours — Wed: 9:00am-5:00pm
5. Post Office - Citrus
Post Offices

1941 California Ave
Corona, CA 92877
California
(951)340-3783
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Hours — Wed: 8:00am-6:00pm
6. Post Office - Corona
Post Offices

414 W Grand Blvd
Corona, CA 92878
California
(951)737-3120
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Hours — Wed: 8:00am-6:00pm

7. Post Office - CPU Storequest
Post Offices

3915 Green River Rd
Corona, CA 92880
California
(951)734-7100
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Hours — Wed: 9:00am-4:15pm
8. Post Office - Cyclone Private Postal Boxes
Post Offices

23441 Golden Springs Dr
Diamond Bar, CA 91765
California
(909)860-4900
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Hours — Wed: 9:00am-5:30pm
9. Post Office - Ellsworth Stationers
Post Offices

112 N Glendora Ave
Glendora, CA 91741
California
(626)335-4031
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Hours — Wed: 9:00am-6:00pm
10. Post Office - Etiwanda
Post Offices

7615 Etiwanda Ave
Rancho Cucamonga, CA 91739
California
(909)899-8644
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Hours — Wed: 8:00am-4:00pm
11. Post Office - Glendora
Post Offices

255 S Glendora Ave
Glendora, CA 91740
California
(626)857-9127
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Hours — Wed: 9:00am-5:00pm
12. Post Office - Guasti
Post Offices

323 N Turner Ave
Guasti, CA 91743
California
(909)937-6749
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Hours — Wed: 8:30am-5:00pm
13. Post Office - Mt Baldy
Post Offices

6730 Mt Baldy Rd
Mt Baldy, CA 91759
California
(909)982-7807
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Hours — Wed: 8:30am-1:00pm,2:00pm-5:00pm
14. Post Office - Ontario
Post Offices

1555 E Holt Blvd
Ontario, CA 91761
California
(909)933-3837
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Hours — Wed: 8:30am-5:00pm
15. Post Office - Placentia
Post Offices

1400 N Kraemer Blvd
Placentia, CA 92871
California
(714)993-1163
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Hours — Wed: 8:30am-5:00pm
16. Post Office - San Dimas
Post Offices

300 E Bonita Ave
San Dimas, CA 91773
California
(909)599-0651
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Hours — Wed: 9:00am-5:00pm
17. Post Office - Stremmels Of Claremont
Post Offices

849 W Foothill Blvd
Claremont, CA 91711
California
(909)621-1816
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Hours — Wed: 9:30am-1:30pm,2:30pm-5:30pm
18. Post Office - Sunkist
Post Offices

2320 E Lincoln Ave
Anaheim, CA 92816
California
(714)635-1304
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Hours — Wed: 9:00am-5:00pm
19. Post Office - Walnut
Post Offices

280 S Lemon Ave
Walnut, CA 91788
California
(909)444-7901
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Hours — Wed: 8:30am-5:00pm
20. Post Office - Water 4 U
Post Offices

341 S Lincoln Ave Ste G
Corona, CA 92882
California
(909)280-9415
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Hours — Wed: 9:00am-7:30pm

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