Looking for a termite inspector in Ontario, CA? Describe your project once and up to three licensed termite inspectors who work in Ontario and San Bernardino County get back to you with a quote. It's free and there is no obligation.
Ontario is home to about 185,285 people (2024 Census Bureau estimate), a growing community (+5.7% since 2020). With 3,707 people per sq mi, it is a suburban area. Termite pressure and loan requirements make WDO reports routine in local home sales.
Ontario at a glance
- Population (Census Bureau estimate, 2024)
- 185,285 (+5.7% since 2020)
- Rank in California
- 25th of 482 cities and towns
- Land area
- 50 sq mi
- Population density
- 3,707 people per sq mi (suburban)
- Type
- City (Ontario city)
- Main county
- San Bernardino County
What to check before hiring in Ontario
- License: in California, WDO inspections are done by state-licensed pest control operators.
- Form: ask your lender which form it accepts.
- Independence: inspection and treatment can be done by different companies.
- Price drivers: home size, access and deadline.
Useful official resources
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NPMA: National Pest Management Association
Official information and guidance.
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EPA: termites
Official information and guidance.
Services available in Ontario
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WDO / WDI inspection
Wood-destroying organism inspection with the report used for real estate and lenders.
Frequently asked questions in Ontario
How much does a termite inspection cost in Ontario, CA?
It depends on the home and the deadline. Describe the home: inspectors who serve Ontario reply with a quote.
How long does it take?
Often under an hour, with the report the same day.
Who pays for it?
It is negotiated between buyer and seller; in VA loans, rules on who pays vary.
Which licensed termite inspectors will contact me?
Up to three independent licensed termite inspectors who serve Ontario and the surrounding area, chosen for the service you need. Your details are shared only with your consent.
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.