Pest control · Ontario, California
Pest control in Ontario, CA
Termites, ants, roaches, scorpions or rodents? 58% of Ontario's homes are detached houses[1], and 14% were built since 2010. Request a licensed pest-control company that services the area. Ontario, in San Bernardino County — ZIPs 91761, 91762, 91764, counts 187,013 residents (2025 estimate)[2].
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The Ontario pest control picture in brief
- Population (2025 est.)
- 187,013[2]+6.7% since 2020
- County
- San Bernardino[2]
- Land area
- 50.0 sq mi[3]
- Detached single-family homes
- 58%[1]the 2nd-lowest share of the 15 Inland Empire suburbs we cover
- Homes built 2010 or later
- 14%[1]the 4th-highest share of the 15 Inland Empire suburbs we cover
- Households renting
- 42%[1]2020–2024
- Population change, 2020–2025
- +6.7%[2]the 2nd-fastest-growing of the 15 Inland Empire suburbs we cover
- Land area
- 50.0 sq mi[3]city limits
What the local data means for pest control in Ontario
Ontario is one of the fastest-growing Inland Empire suburbs tracked here: 187,013 people (2025 estimate), up 6.7% since 2020[2]. It covers 50.0 square miles (3,741 residents per square mile, the 7th densest), sits entirely in San Bernardino County, in ZIP codes 91761, 91762, 91764[3].
Building amid 6.7% growth since 2020 pushes construction into previously open land, which stirs up the pests already living there — and denser housing gives them more neighboring homes to visit.
3 ZIP codes cover Ontario — 91761 (57% of the city's land), 91762 (27% of the city's land), 91764 (16% of the city's land)[4].
The closest tracked neighbours are Eastvale (5.3 mi S), Chino (5.5 mi SW) and Rancho Cucamonga (6.8 mi N)[3].
58% of Ontario's 55,966 housing units are detached houses[1] — the 2nd-lowest share of the 15 Inland Empire suburbs we cover; nearby, Eastvale (88%), Chino (68%), and Rancho Cucamonga (62%). With more attached housing, pests move between units — whole-building treatment matters more.
14% of homes were built in 2010 or later[1] (the 4th-highest share of the 15 Inland Empire suburbs we cover; Eastvale (29%), Chino (21%), and Rancho Cucamonga (8%) nearby), and population changed +6.7% from 2020 to 2025[2]. Many owners here can still check for a builder termite pre-treatment and warranty.
About 3,741 people live per square mile of land across 50.0 square miles[2][3] — the 7th-densest of the 15 Inland Empire suburbs we cover. More yard between houses puts the focus on the foundation perimeter and entry points.
42% of households rent and 58% own[1]. Renters: check the lease for who handles pest control.
Measured against the 15 suburbs on this site, Ontario records the 2nd-lowest share of detached houses (58%)[1], the 2nd-fastest growth since 2020 (6.7%)[2], the 2nd-oldest housing (by median year built) (1980)[1], and the 2nd-highest renter share (42%)[1].
pest control help in Ontario: what to do next
Requests go to Pest control contractors serving the Ontario area — ZIP codes 91761, 91762, 91764.
Before you call: choosing a pest-control plan
The data underneath this Ontario page
| Measure | Ontario | Median of 15 | Difference |
|---|---|---|---|
| Growth since 2020 | 6.7% | 2.9% | 4 pts faster |
| Flood reports (10 mi) | 45 | 34 | 11 more |
| Detached single-family | 58% | 73% | 15 pts lower |
| Renter-occupied | 42% | 36% | 6 pts higher |
| Residents per sq mi | 3,741 | 3,231 | 16% denser |
| Median year built | 1980 | 1989 | 9 years older |
Sorted by largest difference. Each median is the middle value across the covered Inland Empire suburbs, from the same sources.
| City | People / sq mi | Growth since 2020 | Population |
|---|---|---|---|
| Ontario | 3,741 | 6.7% | 187,013 |
| Eastvale 5.3 mi | 5,568 | 1.2% | 70,594 |
| Chino 5.5 mi | 3,231 | 5.6% | 96,957 |
| Rancho Cucamonga 6.8 mi | 3,823 | 1.9% | 177,856 |
| Chino Hills 9.4 mi | 1,731 | -1.2% | 77,519 |
| Fontana 9.6 mi | 5,111 | 6.1% | 221,223 |
| Measure | Value |
|---|---|
| Housing units | 55,966 |
| Detached single-family | 32,411 (58%) |
| Occupied homes | 53,770 |
| Owner-occupied | 31,202 (58%) |
| Renter-occupied | 22,568 (42%) |
| Median home value | $607,600 |
ACS 2020–2024 estimates.
| Built | Units | Share | Margin of error |
|---|---|---|---|
| 2020 or later | 2,509 | 4.5% | ±435 |
| 2010 to 2019 | 5,500 | 9.8% | ±637 |
| 2000 to 2009 | 3,841 | 6.9% | ±488 |
| 1990 to 1999 | 4,700 | 8.4% | ±856 |
| 1980 to 1989 | 11,576 | 20.7% | ±787 |
| 1970 to 1979 | 10,209 | 18.2% | ±836 |
| 1960 to 1969 | 4,854 | 8.7% | ±526 |
| 1950 to 1959 | 7,712 | 13.8% | ±557 |
| 1940 to 1949 | 2,174 | 3.9% | ±344 |
| 1939 or earlier | 2,891 | 5.2% | ±375 |
ACS 2020–2024 estimates; margins of error are the Census Bureau's 90% intervals.
| ZIP (ZCTA) | Share of Ontario's land | Share of the ZIP inside the city |
|---|---|---|
| 91761 | 57% | 100% |
| 91762 | 27% | 95% |
| 91764 | 16% | 100% |
pest control questions from Ontario homeowners
My Ontario home is new — do I need termite protection?
Check your closing documents for a builder termite pre-treatment and warranty first. 14% of Ontario homes were built in 2010 or later[1].
I rent in Ontario. Who pays for pest control?
Your lease decides. 42% of Ontario households rent[1].
Which areas does this page cover?
ZIP 91761, 91762, and 91764[4], San Bernardino County. Nearest suburbs with their own pages: Eastvale (5.3 mi), Chino (5.5 mi), and Rancho Cucamonga (6.8 mi)[3].
A lot of Ontario homes predate 1980 — what does that mean for termite pre-treatment work?
50% of Ontario's housing units were built before 1980, 22.8% before 1960[1] — the 2nd-highest share of the 15 Inland Empire suburbs we cover. Older houses tend to have more gaps at the foundation, eaves and utility penetrations — ask the inspector to show you the entry points, not just treat.
My Ontario home is fairly new — could the termite pre-treatment still be under warranty?
Possibly: 14% of Ontario's housing units were built in 2010 or later[1], the 4th-highest share of the 15 Inland Empire suburbs we cover. Check your closing paperwork for warranties before paying for a repair.
I rent in Ontario. Who arranges the repair?
42% of occupied Ontario homes are rented[1], the 2nd-highest share of the 15 Inland Empire suburbs we cover. Tell your landlord or property manager in writing first; your lease says who arranges repairs.
Sources
- Census ACS 2020–2024 5-year (keyless bulk)
- Census population estimates, Vintage 2025
- Census Gazetteer 2025
- Census 2020 ZCTA–place file
- NOAA Storm Events Database
Data pulled Sep 28, 2026. Full citations and method.