Post Office in Ontario, CA

Below is a list of local post offices in Ontario. We suggest you call them for service hours, wait times, and other questions you might have.

Contact us to be included in this directory.

List of Ontario Post Offices:

Post Office - Downtown Ontario
123 W Holt Blvd
Ontario, CA
(800) 275-8777

Post Office - Plaza Center
1126 N Mountain Ave
Ontario, CA
(800) 275-8777

US Post Office
333 E Arrow Hwy
Upland, CA

US Post Office
5186 Benito St
Montclair, CA

US Post Office
2801 E Guasti Rd
Guasti, CA

US Post Office
140 Harvard Ave
Claremont, CA

US Post Office
6649 Amethyst Ave
Alta Loma, CA
(909) 987-0785

Postal Annex
3045 S Archibald Ave Ste H
Ontario, CA
(909) 947-4413

US Post Office
7615 Etiwanda Ave
Etiwanda, CA
(909) 899-8644

US Post Office
10798 Jurupa Rd
Mira Loma, CA

Post Office - LA Verne
3355 N White Ave
La Verne, CA
(800) 275-8777

US Post Office
1801 Town And Country Dr
Norco, CA

US Post Office
10275 Hole Ave
Riverside, CA

US Post Office
615 N Bush St
Santa Ana, CA
(800) 275-8777

US Post Office
1220 Highland Ave
Duarte, CA
(800) 275-8777

Suncoast Post Tension
1528 E Cedar St
Ontario, CA
(909) 673-0490

US Post Office
8082 Commonwealth Ave
Buena Park, CA

US Post Office
3681 Sunnyside Dr
Riverside, CA

US Post Office
4150 Chicago Ave
Riverside, CA
(951) 788-4058

There are thousands of post offices across the United States. Find one near you today.