Costco at 3680 E Guasti Rd, Ontario, California. Find store hours, phone number, driving directions and answers to frequently asked questions below.
Located at 3680 E Guasti Rd, this Costco in Ontario provides bulk groceries, electronics, and household items. The store offers exclusive Kirkland Signature products and a treasure-hunt shopping experience for its loyal members. Hours may vary; it's best to call ahead or check the official listing.
Address & Contact
Costco
3680 E Guasti Rd,
Ontario, CA 91761
Ontario, CA 91761
909-789-1221
Store information verified in 2026
Store Hours
Monday7:00am - 6:00pm
Tuesday7:00am - 6:00pm
Wednesday7:00am - 6:00pm
Thursday7:00am - 6:00pm
Friday7:00am - 6:00pm
Saturday7:00am - 6:00pm
Sunday7:00am - 6:00pm
Store hours may vary. Please call to confirm.
Location & Map
Costco - Ontario is located on 3680 E Guasti Rd, Ontario, CA 91761
Nearby Locations
Costco - Rancho Cucamonga
11800 4th St, Rancho Cucamonga, CA 91730
11800 4th St, Rancho Cucamonga, CA 91730
1 miles
Costco - Jurupa Valley
5030 Hamner Ave, Jurupa Valley, CA 91752
5030 Hamner Ave, Jurupa Valley, CA 91752
4 miles
Costco - Montclair
9404 Central Ave, Montclair, CA 91763
9404 Central Ave, Montclair, CA 91763
7 miles
Costco - Fontana
16505 Sierra Lakes Pkwy, Fontana, CA 92336
16505 Sierra Lakes Pkwy, Fontana, CA 92336
8 miles
Costco - Chino Hills
13111 Peyton Dr, Chino Hills, CA 91709
13111 Peyton Dr, Chino Hills, CA 91709
10 miles
Costco - Corona
480 N Mckinley St, Corona, CA 92879
480 N Mckinley St, Corona, CA 92879
12 miles
Frequently Asked Questions
Is this the only Costco location in Ontario?
Yes, this is the only Costco store located in Ontario.
How can I get directions to this Costco location?
You can find directions by entering 3680 E Guasti Rd into your preferred navigation app or website.