63/100CR Score
Ranked #1 because of its Google rating and trade focus: 4.7★ from 1,367 Google reviews, listed on Google as “Pest control service”.
Best Pest Control Companies in Ontario, CA (2026)
380 pest control companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Ontario: Orkin, CR Score 63/100; 4.7★ from 1,367 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Dewey Pest & Termite Control, posts 24/7 hours; ranked #2 of 380.
- 5
Most-reviewed: Brooks Pest Control, 11,523 Google reviews at 4.6★, the most of 380 ranked; ranked #5.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
380 Ontario pest control companies are ranked here by CR Score, from ten published factors. 90 are open 24/7, 269 open Saturdays and 140 open Sundays, based on posted hours. The median Google rating is 4.9★ across 380 rated businesses.
Top 10 pest control companies in Ontario at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Orkin | 63 | 4.7★ (1,367) | Claremont, 4 mi away | 24/7 | Overall |
| 2 | Dewey Pest & Termite Control | 62 | 4.8★ (244) | Ontario | 24/7 | Emergencies |
| 3 | Orkin | 62 | 4.8★ (3,667) | Riverside, 15 mi away | 24/7 | — |
| 4 | Western Exterminator | 61 | 4.7★ (596) | Chino, 6 mi away | 24/7 | — |
| 5 | Brooks Pest Control | 61 | 4.6★ (11,523) | Corona, 14 mi away | Sat · Sun · Evenings | Most reviews |
| 6 | Terminix | 61 | 5.0★ (52) | Ontario | 24/7 | — |
| 7 | Orkin | 61 | 4.8★ (387) | San Dimas, 9 mi away | 24/7 | — |
| 8 | Aptive Pest Control | 60 | 4.7★ (9,224) | Corona, 13 mi away | Sat · Evenings | — |
| 9 | Mosquito Squad Plus of Rancho Cucamonga | 60 | 4.9★ (183) | Upland, 9 mi away | 24/7 | — |
| 10 | Aptive Pest Control | 60 | 4.7★ (1,940) | Fontana, 5 mi away | Sat · Evenings | — |
The 380 best pest control companies in Ontario, ranked
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Based in Ontario
62/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.8★ from 244 Google reviews, listed on Google as “Pest control service”.
#3 Orkin
Based in Riverside, 15 mi away
62/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.8★ from 3,667 Google reviews, listed on Google as “Pest control service”.
Based in Chino, 6 mi away
61/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.7★ from 596 Google reviews, listed on Google as “Pest control service”.
Based in Corona, 14 mi away
61/100CR ScoreRanked #5 because of its Google rating and review volume: 4.6★ from 11,523 Google reviews, the most in Ontario.
#6 Terminix
Based in Ontario
61/100CR ScoreRanked #6 because of its Google rating and trade focus: 5.0★ from 52 Google reviews, listed on Google as “Pest control service”.
#7 Orkin
Based in San Dimas, 9 mi away
61/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.8★ from 387 Google reviews, listed on Google as “Pest control service”.
Based in Corona, 13 mi away
60/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.7★ from 9,224 Google reviews, listed on Google as “Pest control service”.
Based in Upland, 9 mi away
60/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.9★ from 183 Google reviews, listed on Google as “Pest control service”.
Based in Fontana, 5 mi away
60/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.7★ from 1,940 Google reviews, listed on Google as “Pest control service”.
Based in Fontana, 2 mi away
60/100CR ScoreRanked #11 because of its Google rating and trade focus: 5.0★ from 45 Google reviews, listed on Google as “Pest control service”.
#12 Terminix
Based in San Bernardino, 21 mi away
60/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.8★ from 2,292 Google reviews, listed on Google as “Pest control service”.
Based in Riverside, 18 mi away
60/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.9★ from 769 Google reviews, listed on Google as “Pest control service”.
#14 Orkin
Based in Anaheim, 24 mi away
60/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.8★ from 3,213 Google reviews, listed on Google as “Pest control service”.
Based in Yorba Linda, 13 mi away
60/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.7★ from 7,199 Google reviews, listed on Google as “Pest control service”.
Based in Upland, 4 mi away
60/100CR ScoreRanked #16 because of its Google rating and trade focus: 5.0★ from 320 Google reviews, listed on Google as “Pest control service”.
Based in West Covina, 16 mi away
60/100CR ScoreRanked #17 because of its Google rating and trade focus: 5.0★ from 252 Google reviews, listed on Google as “Pest control service”.
#18 Orkin
Based in Anaheim, 17 mi away
60/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.9★ from 460 Google reviews, listed on Google as “Pest control service”.
Based in Riverside, 18 mi away
59/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.7★ from 1,026 Google reviews, listed on Google as “Pest control service”.
Based in Rancho Cucamonga, 7 mi away
59/100CR ScoreRanked #20 because of its Google rating and trade focus: 4.9★ from 505 Google reviews, listed on Google as “Pest control service”.
Based in Colton, 20 mi away
59/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.8★ from 783 Google reviews, listed on Google as “Pest control service”.
Based in Chino Hills, 7 mi away
59/100CR ScoreRanked #22 because of its Google rating and trade focus: 5.0★ from 112 Google reviews, listed on Google as “Pest control service”.
#23 The Beekeeper
Based in Ontario
59/100CR ScoreRanked #23 because of its Google rating and trade focus: 4.5★ from 29 Google reviews, listed on Google as “Pest control service”.
Based in La Mesa, 8 mi away
59/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.9★ from 52 Google reviews, listed on Google as “Pest control service”.
Based in Corona, 14 mi away
59/100CR ScoreRanked #25 because of its Google rating and trade focus: 5.0★ from 819 Google reviews, listed on Google as “Pest control service”.
Pest control companies ranked #26 to #50
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 380 ranked pest control companies here; the rest are on their profiles.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | HomeShield Pest Control | 58 | 5.0★ (171) | 5 mi |
| 27 | Orkin | 58 | 4.8★ (306) | 17 mi |
| 28 | Bull’s Eye Pest Control | 58 | 5.0★ (164) | 5 mi |
| 29 | the bugman | 58 | 4.9★ (2,576) | 19 mi |
| 30 | PURCOR Pest Solutions | 58 | 4.9★ (562) | 23 mi |
| 31 | Aptive Pest Control | 58 | 4.9★ (149) | 4 mi |
| 32 | Pro Tech Pest Elimination Inc. | 58 | 5.0★ (379) | 4 mi |
| 33 | Bull's Eye Pest Control | 58 | 5.0★ (671) | 15 mi |
| 34 | Moxie Pest Control | 58 | 4.8★ (1,716) | 14 mi |
| 35 | Terminix | 58 | 4.9★ (389) | 23 mi |
| 36 | Go-Pher The Kill Pest Control Riverside | 58 | 5.0★ (754) | 16 mi |
| 37 | PURCOR Pest Solutions | 58 | 4.6★ (240) | 15 mi |
| 38 | Carpio Pest Control | 57 | 5.0★ (23) | 8 mi |
| 39 | Mosquito Squad of Orange County | 57 | 4.9★ (320) | 17 mi |
| 40 | EarlyBird Extermination, Inc. | 57 | 4.8★ (37) | 2 mi |
| 41 | Eli the Bee Guy | Bee Removal and Rescue | 57 | 5.0★ (254) | In Ontario |
| 42 | Hawx Pest Control | 57 | 4.8★ (525) | 12 mi |
| 43 | ProCraft Pest Control | 57 | 4.9★ (316) | 4 mi |
| 44 | Gallant Termite & Pest Control | 57 | 4.9★ (114) | 4 mi |
| 45 | Eary Termite & Pest Service | 57 | 4.6★ (67) | 5 mi |
| 46 | Trident Pest Control | 57 | 5.0★ (301) | 20 mi |
| 47 | Bluedot Pest | 57 | 5.0★ (162) | 10 mi |
| 48 | Pest Hero | 57 | 5.0★ (54) | 9 mi |
| 49 | Aptive Pest Control | 57 | 4.8★ (2,220) | 21 mi |
| 50 | Rodent Guys Gopher & Pest Control | 57 | 4.9★ (256) | 10 mi |
Also serving Ontario
20 more pest control companies within 25 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| B & S Pest Control Corporation Claremont CA | 5.0★ (2) | 5 mi |
| Bell Pest Control | In Ontario | |
| Bio Pest Control Shield | 4.5★ (2) | 3 mi |
| Contech Pest Control | In Ontario | |
| Crest Pest Control | 5.0★ (2) | 3 mi |
| Eazell pest services | 5.0★ (2) | 3 mi |
| EcoZone Pest Control | 5.0★ (2) | 3 mi |
| Everguard Exterminators | 3.0★ (2) | 4 mi |
| Hunting Pest Services | 5.0★ (2) | 4 mi |
| Impressive Exterminating | 5.0★ (2) | In Ontario |
| McKinney Pest Control | 5.0★ (1) | In Ontario |
| Nexa Guard Pest Services | 4.5★ (2) | 6 mi |
| Osborne Pest Control Ontario | In Ontario | |
| Pastene Pest Control | 4.0★ (2) | 10 mi |
| Pest Control Guardian Plus | 4.5★ (2) | In Ontario |
| Professional Pest Management | 5.0★ (2) | In Ontario |
| Rodents Stop - Ontario | In Ontario | |
| Shield Control Exterminators of Ontario | In Ontario | |
| T&P SOLUTIONS | 1.0★ (1) | In Ontario |
| Urban Shield Co | In Ontario |
How we ranked Ontario pest control companies
We scored 380 Ontario pest control companies on ten factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed November 3, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In Ontario data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |
Pest control companies in Ontario: frequently asked questions
Who is the best pest control company in Ontario?
By CR Score, the highest-ranked pest control company in Ontario, CA is Orkin with a CR Score of 63/100. It has 4.7★ from 1,367 Google reviews. It is open 24/7. Dewey Pest & Termite Control (#2) and Orkin (#3) follow. We ranked 380 pest control companies on ten factors, last updated November 3, 2026.
How many pest control companies are there in Ontario?
ContractorsRanked ranks 380 pest control companies serving Ontario, CA. 4 of them are based in Ontario; the rest serve it from nearby towns. Another 20 within 25 mi are listed but not ranked yet. Counts are as of November 2026.
Which pest control companies in Ontario are open 24/7?
90 ranked pest control companies in Ontario post 24/7 hours. The highest-ranked are Orkin (#1), Dewey Pest & Termite Control (#2) and Orkin (#3). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which pest control companies in Ontario work on weekends?
269 of 380 ranked pest control companies post Saturday hours and 140 post Sunday hours. The highest-ranked open Saturdays are Orkin (#1), Dewey Pest & Termite Control (#2) and Orkin (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Ontario pest control companies have?
The median Google rating among 380 rated pest control companies in Ontario is 4.9★, with a median of 25 reviews. Brooks Pest Control has the most, 11,523 reviews, and ranks #5. We adjust ratings for review count, so a few five-star reviews cannot top the list.
How does ContractorsRanked rank pest control companies?
Each pest control company gets a 0–100 CR Score from ten published factors, led by reputation (25%), credentials (15%), review volume (10%) and trade focus (10%). A business with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Do pest control companies outside Ontario count in this ranking?
Yes, if they are within 25 mi of the Ontario city center, our service radius for pest control companies. Each listing shows where the business is based and how far away it is. Proximity is 5% of the CR Score, so a nearby business gets a small edge.
Can pest control companies pay to rank higher on ContractorsRanked?
No. The CR Score never reads payment status, and this ranking has 0 paid placements. Up to 3 Featured businesses may appear above the list, labelled Featured and showing their honest rank.
Update log for Ontario
- November 2026: CR Scores recalculated for 380 pest control companies serving Ontario.
- November 2026: 9 duplicate listings merged.
More pest control companies and Ontario pages
Pest control companies near Ontario
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