Engineering & architecture in Ontario, CA

52 engineering & architecture listed in Ontario, California. 40 with a phone number and 42 with a website.

Ontario accounts for 0% of the engineering & architecture listed in California and ranks #46 among California cities for engineering & architecture.

Quick answer

Ontario, CA has 52 engineering & architecture listed on USA Business Search. 40 list a phone number and 42 list a website. The most listings are in ZIP codes 91761, 91764, 91762.

Updated October 2026

Geologic Associates, Inc.

2777 E Guasti Rd Ste 1, Ontario, CA 91761 · Claim or fix

Call (909) 626-2282 Website Map

HMC Architects

3546 Concours, Ontario, CA 91764 · Claim or fix

Call (909) 989-9979 Website Map

Bisimoto Engineering

2060 S Lynx Ave, Ontario, CA 91761 · Claim or fix

Call (888) 922-6686 Website Map

EnviroKinetics

101 S Milliken Ave, Ontario, CA 91761 · Claim or fix

Call (909) 621-7599 Website Map

World Fried Chicken

2527 S Euclid Ave, Ontario, CA 91762 · Claim or fix

Call (909) 443-7322 Website Map

Flowdynamics, Inc.

1215 E Acacia St, Ontario, CA 91761 · Claim or fix

Call (909) 930-5522 Website Map

A B Workgroup Consulting Inc

1015 E 4th St, Ontario, CA 91764 · Claim or fix

Call (909) 988-2500 Map

Acorn Industrial Corporation

2078 E Francis St, Ontario, CA 91761 · Claim or fix

Call (626) 808-8827 Website Map

Aecom Technical Services Inc

3500 Porsche Way Ste 300, Ontario, CA 91764 · Claim or fix

Call (909) 579-3050 Map

Aia San Mateo County

121 W B St, Ontario, CA 91762 · Claim or fix

Website Map

Am-tek Engineering Inc

1180 E Francis St Ste C, Ontario, CA 91761 · Claim or fix

Call (909) 673-1633 Website Map

Anthony Engineering Contractors, Inc.

1514 S Bon View Ave, Ontario, CA 91761 · Claim or fix

Call (909) 472-5395 Map

Arrowhead Engineering

760 E Francis St Ste F, Ontario, CA 91761 · Claim or fix

Call (909) 773-1069 Website Map

Brian Bloom Architect

350 S Milliken Ave Ste G, Ontario, CA 91761 · Claim or fix

Call (909) 390-7209 Website Map

David Evans and Associates

4141 Inland Empire Blvd #250, Ontario, CA 91764 · Claim or fix

Call (909) 481-5750 Website Map

Dcga Engineers

4750 Ontario Mills Pkwy, Ontario, CA 91764 · Claim or fix

Call (909) 987-0017 Website Map

Ekyube Llc

1131 W 6th St Ste 300, Ontario, CA 91762 · Claim or fix

Call (844) 734-7571 Website Map

Electrical Consultants, Inc.

3633 Inland Empire Blvd., Ste 670, Ontario, CA 91764 · Claim or fix

Call (909) 315-7150 Website Map

G P Surveying

1412 S Helen Ave, Ontario, CA 91762 · Claim or fix

Call (909) 986-8120 Website Map

Garver

3281 E Guasti Rd Floor 7, Ontario, CA 91761 · Claim or fix

Call (951) 384-0989 Website Map

Ge Company

3990 Concours Ste 300, Ontario, CA 91764 · Claim or fix

Call (909) 989-4957 Map

Group Delta, An Nv5 Company

1035 S Milliken Ave Ste G, Ontario, CA 91761 · Claim or fix

Call (909) 295-5550 Website Map

GUIDA

3536 Concours St Ste 201, Ontario, CA 91764 · Claim or fix

Call (949) 777-2000 Website Map

H Fam Engineering Inc

2131 S Hellman Ave Ste F, Ontario, CA 91761 · Claim or fix

Call (909) 930-5678 Map

Hi Q Engineering

1441 S Balboa Ave, Ontario, CA 91761 · Claim or fix

Website Map

Hntb Corporation

3633 Inland Empire Blvd Ste 750, Ontario, CA 91764 · Claim or fix

Call (909) 890-0622 Map

Jns Industries

1616 E Francis St, Ontario, CA 91761 · Claim or fix

Website Map

Key West International Inc

815 W Holt Blvd Ste 401, Ontario, CA 91762 · Claim or fix

Website Map

Kleinfelder

620 S Magnolia Ave Ste G, Ontario, CA 91762 · Claim or fix

Call (909) 657-1716 Website Map

L.d. King Inc.

975 N Haven Ave Ste 200, Ontario, CA 91764 · Claim or fix

Call (909) 945-0526 Website Map

Lamb Engineering Inc

1630 E Francis St, Ontario, CA 91761 · Claim or fix

Website Map

Land Development Design Company, Llc.

2313 E Philadelphia St Ste F, Ontario, CA 91761 · Claim or fix

Call (909) 930-1466 Map

Lh Technical Llc

1101 S Milliken Ave Ste E1010, Ontario, CA 91761 · Claim or fix

Call (909) 277-7500 Website Map

Lochner

3190 Shelby St Ste C, Ontario, CA 91764 · Claim or fix

Call (909) 890-9693 Website Map

Mark Thomas

4200 Concours, Ontario, CA 91764 · Claim or fix

Call (909) 291-7246 Map

MB Professional Service

1236 Brooks St, Ontario, CA 91762 · Claim or fix

Call (909) 988-2795 Website Map

Michael Baker International

3536 Concours St #100, Ontario, CA 91764 · Claim or fix

Call (909) 974-4900 Map

Mulholland Consulting, Inc.

3200 E Guasti Rd Ste 100, Ontario, CA 91761 · Claim or fix

Call (909) 654-5563 Website Map

Mvi Engineering & Manufacturing

2131 S Hellman Ave Ste J, Ontario, CA 91761 · Claim or fix

Call (951) 360-9790 Website Map

Ratliff Environmental

2115 S Hellman Ave, Ontario, CA 91761 · Claim or fix

Website Map

SCS Engineers, Ontario

4200 Jurupa St Ste 320, Ontario, CA 91761 · Claim or fix

Call (909) 373-2508 Website Map

SitelogIQ

1151 N Del Rio Pl, Ontario, CA 91764 · Claim or fix

Call (855) 581-6464 Website Map

Sma

1235 E Francis St Ste G, Ontario, CA 91761 · Claim or fix

Website Map

Smith Engineering

2837 E Cedar St, Ontario, CA 91761 · Claim or fix

Call (909) 923-3331 Website Map

South Precision Machining

1440 Brooks St, Ontario, CA 91762 · Claim or fix

Website Map

Splice Sleeve North America

4345 E Lowell St, Ontario, CA 91761 · Claim or fix

Website Map

Swt Engineering Inc

800 S Rochester Ste C, Ontario, CA 91761 · Claim or fix

Call (909) 390-1328 Website Map

Thomas G Matlock & Associates Inc

1614 E Holt Blvd Ste 106, Ontario, CA 91761 · Claim or fix

Call (909) 983-7777 Map

Tranifilms Llc

615 N Euclid Ave Ste 205, Ontario, CA 91762 · Claim or fix

Call (951) 692-2879 Website Map

Transportation And Energy Solutions, Inc

3175 Sedona Ct Ste 6, Ontario, CA 91764 · Claim or fix

Website Map

Udecm Inc.

3401 Centre Lake Dr, Ontario, CA 91761 · Claim or fix

Website Map

Westland Group, Inc

4150 Concours Ste 100, Ontario, CA 91764 · Claim or fix

Website Map

How to choose an engineering firm in Ontario

Ask who will actually do the work and how often you'll hear from them.
Get the scope, price and timeline in writing.
Ask for two references from clients like you.

Check the license: Board for Professional Engineers, Land Surveyors, and Geologists.

Common questions

How many engineering & architecture are listed in Ontario, California?

USA Business Search shows 52 engineering & architecture in Ontario. 40 list a phone number and 42 list a website.

Which ZIP codes do these listings cover?

They include ZIP codes 91761, 91764, 91762.

How do I choose an engineering firm in Ontario?

Ask who will actually do the work and how often you'll hear from them. Get the scope, price and timeline in writing. Check the license with the Board for Professional Engineers, Land Surveyors, and Geologists.

How do engineering & architecture in Ontario compare with the rest of California?

Ontario has 0% of the 12,160 engineering & architecture listed in California, which ranks #46 among California cities for this category.

How do I add or fix a listing?

Listings are free. Use Add your business, or the Claim or fix link on any listing.

More professional services in Ontario

Shipping & couriers in Ontario Business consulting in Ontario Staffing & employment in Ontario IT & computer services in Ontario Accountants & tax in Ontario Software development in Ontario Funeral homes in Ontario

Engineering & architecture nearby

Engineering & architecture in Rancho Cucamonga Engineering & architecture in Upland Engineering & architecture in Montclair Engineering & architecture in Chino Engineering & architecture in Eastvale Engineering & architecture in Claremont

All engineering & architecture in California Engineering & architecture nationwide

Own one of these businesses? Claim your free listing or see what an optimized listing adds.