Businesses in Ontario, California
7,123 local businesses across 109 categories, from manufacturing & wholesale, restaurants and more shopping. 0.5% of everything listed in California.
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Quick answer
Ontario, CA has 7,123 businesses listed on USA Business Search in 109 categories across 15 ZIP codes. The most-listed are manufacturing & wholesale, restaurants and more shopping.
Updated October 2026Most listed in Ontario
Manufacturing & wholesaleRestaurantsMore shoppingDoctors & clinicsShipping & couriersReal estate agentsAuto repairClothing & boutiquesBusiness consultingChurches & places of worship
Home services
General contractors (140)Movers & hauling (31)House cleaning (28)HVAC & heating (27)Windows & doors (27)Flooring (23)Kitchen & bath remodeling (19)Plumbers (18)Roofers (18)Concrete & paving (17)Electricians (17)Landscaping & lawn care (15)Water & fire restoration (13)Locksmiths (12)Handyman services (11)Interior design (10)Pest control (10)Painters (9)Garage doors (5)Home inspectors (4)Solar (4)
Marketing & advertising
Auto
Food & drink
Health & medical
Beauty & personal care
Professional services
Real estate
Finance & insurance
Legal
Shopping & retail
Pets
Fitness & recreation
Hotels & travel
Education & childcare
Events & entertainment
Business & industrial
Community & faith
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More businesses in Ontario
Golf (1)
Home inspectors (4)
Edwards Integrity Inspections
Specific Structural Inspection
R & G Machine Services
Best Infrared Services
Outdoor adventure & tours (4)
All Japan Tours
Desert Rentals Unlimited
Waterworks Technology, Inc.
Bonafide Bare Beauty
Solar (4)
Solar Electrical Plus INC
Cucell Energy
Daylight Solar Energy
Summerwind Solar
Vacation rentals (1)
Great Destinations
Yoga studios (1)
YogaSix New Haven
Common questions
How many businesses are listed in Ontario, California?
USA Business Search shows 7,123 businesses in Ontario across 109 categories.
How does Ontario compare with other California cities?
Ontario is #29 of 1,980 California cities and towns we cover by number of listings, with 0.5% of everything listed in the state.
What kinds of businesses are most common in Ontario?
The most-listed categories are manufacturing & wholesale, restaurants and more shopping.
How do I add a Ontario business?
Listings are free. Use Add your business, or the Claim or fix link on any listing.