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Cosmos ComputersComputer repair shop in Diamond Bar, CA

Cosmos Computers is a computer repair shop at 1249 S Diamond Bar Blvd Unit 325, Diamond Bar, CA 91765, ranked #48 of 267 computer repair shops in Diamond Bar and rated 4.6 from 10 Google reviews. Open 7 days a week.

Facts here come from public sources and the firm itself. Confirm certifications, insurance and contract terms with the firm before you sign.

Diamond Bar, CAUpdated 0 paid placements in any rankingHow we rank

Call (909) 468-2028Website ↗

Key facts

Key facts about Cosmos Computers
Address1249 S Diamond Bar Blvd Unit 325, Diamond Bar, CA 91765Get directions
Phone(909) 468-2028
Websitecosmoscomputer.com
HoursMonday to Friday: 8:30 AM – 6:30 PM; Saturday: 9 AM – 6:30 PM; Sunday: 9 AM – 12 PM
Google rating4.6 from 10 Google reviews

Services

Each service shows the evidence we matched it on.

  • Computer Repairmain serviceGoogle main category
  • Managed IT Servicesadditional Google category
  • IT Consultingadditional Google category
  • Network Cablingadditional Google category

Service area

Serves Diamond Bar and 11 towns within 20 miles: Chino Hills, Walnut, Pomona, South San Jose Hills, Rowland Heights, Chino, San Dimas, La Verne, Brea, Covina and Yorba Linda.

Based in Diamond Bar, CAView on map

Opening hours

Opening hours for Cosmos Computers
DayHours
Monday8:30 AM – 6:30 PMevening
Tuesday8:30 AM – 6:30 PMevening
Wednesday8:30 AM – 6:30 PMevening
Thursday8:30 AM – 6:30 PMevening
Friday8:30 AM – 6:30 PMevening
Saturday9 AM – 6:30 PMevening
Sunday9 AM – 12 PM
  • Open evenings (after 6 PM)
  • Open Saturdays
  • Open Sundays

Questions about Cosmos Computers

How is Cosmos Computers ranked in Diamond Bar?

Cosmos Computers is ranked #48 of 267 computer repair shops in Diamond Bar by IFR Score, with 58 out of 100 as of November 2026. The score weighs reputation, review volume, recency, availability, service focus, proximity, claimed profile, partnered and client reviews. No business can pay to change its rank.

What are Cosmos Computers’ hours?

Cosmos Computers is open 7 days a week. Its listed hours are Monday to Friday, 8:30 AM – 6:30 PM; Saturday, 9 AM – 6:30 PM; Sunday, 9 AM – 12 PM. On Saturdays it is open 9 AM to 6:30 PM, and on Sundays 9 AM to 12 PM. Hours come from the business listing; holiday hours may differ.

What areas does Cosmos Computers serve?

Serves Diamond Bar and 11 towns within 20 miles: Chino Hills, Walnut, Pomona, South San Jose Hills, Rowland Heights, Chino, San Dimas, La Verne, Brea, Covina and Yorba Linda. The list is based on the business's location and the usual service radius for computer repair. Confirm your address is covered when you call.

What do Google reviews say about Cosmos Computers?

Cosmos Computers has a rating of 4.6 from 10 Google reviews. The IFR Score adjusts the star rating for review count, so a high rating from a few reviews counts for less than the same rating from many.

How do I contact Cosmos Computers?

Call Cosmos Computers on (909) 468-2028. The business is at 1249 S Diamond Bar Blvd Unit 325, Diamond Bar, CA 91765. Its website is linked in the key facts on this page. Ask for a written scope and quote before any work starts.

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Compare nearby computer repair shops

Cosmos Computers compared with nearby businesses
BusinessRankIFR ScoreGoogle ratingSaturdaySundayDistance away
Cosmos Computers (this business)—584.6 (10)YesYes
Gamegeeks#46584.6 (405)YesNo16.6 mi
Advanced Computer Systems (ACS)#47584.6 (193)YesYes17.4 mi
Supreme Tech#49584.7 (197)YesNo16.8 mi

See all 267 ranked computer repair shops in Diamond Bar