62/100CR Score
Ranked #1 because of its Google rating and trade focus: 4.9★ from 1,656 Google reviews, listed on Google as “Pest control service”.
Best Pest Control Companies in Alton, IL (2026)
74 pest control companies ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Alton: Rottler Pest Solutions, CR Score 62/100; 4.9★ from 1,656 Google reviews; open 24/7.
- 3
Best for emergencies (open 24/7): Rottler Pest Solutions, posts 24/7 hours; ranked #3 of 74.
- 6
Most-reviewed: Aptive Pest Control, 6,236 Google reviews at 4.6★, the most of 74 ranked; ranked #6.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
74 Alton pest control companies are ranked here by CR Score, from ten published factors. 11 are open 24/7, 47 open Saturdays and 22 open Sundays, based on posted hours. The median Google rating is 4.9★ across 74 rated businesses.
Most of this list also appears on the Pest control companies in Upper Alton ranking. See Pest control companies in Upper Alton
Top 10 pest control companies in Alton at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Rottler Pest Solutions | 62 | 4.9★ (1,656) | St. Louis, 15 mi away | 24/7 | Overall |
| 2 | STL Pest Control | 60 | 4.9★ (1,852) | St. Louis, 20 mi away | Sat · Sun · Evenings | — |
| 3 | Rottler Pest Solutions | 59 | 4.9★ (733) | Fairview Heights, 24 mi away | 24/7 | Emergencies |
| 4 | Rottler Pest Solutions | 59 | 4.6★ (511) | St. Louis, 16 mi away | 24/7 | — |
| 5 | Pointe Pest Control - Ferguson | 59 | 4.9★ (580) | Ferguson, 12 mi away | Sat · Evenings | — |
| 6 | Aptive Pest Control | 58 | 4.6★ (6,236) | St. Louis, 19 mi away | Sat · Evenings | Most reviews |
| 7 | Moxie Pest Control | 58 | 4.6★ (3,165) | Bridgeton, 16 mi away | Sat | — |
| 8 | EcoShield Pest Solutions | 58 | 4.7★ (1,936) | Maryland Heights, 18 mi away | Sat · Evenings | — |
| 9 | Mosquito Squad of St. Louis Metro East | 57 | 4.9★ (115) | Belleville, 19 mi away | 24/7 | — |
| 10 | Holper's Pest & Animal Solutions STL | 57 | 4.9★ (2,085) | St. Louis, 24 mi away | Sat | — |
The 74 best pest control companies in Alton, 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 St. Louis, 20 mi away
60/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.9★ from 1,852 Google reviews, listed on Google as “Pest control service”.
Based in Fairview Heights, 24 mi away
59/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.9★ from 733 Google reviews, listed on Google as “Pest control service”.
Based in St. Louis, 16 mi away
59/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.6★ from 511 Google reviews, listed on Google as “Pest control service”.
Based in Ferguson, 12 mi away
59/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.9★ from 580 Google reviews, listed on Google as “Pest control service”.
Based in St. Louis, 19 mi away
58/100CR ScoreRanked #6 because of its Google rating and review volume: 4.6★ from 6,236 Google reviews, the most in Alton.
Based in Bridgeton, 16 mi away
58/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.6★ from 3,165 Google reviews, listed on Google as “Pest control service”.
Based in Maryland Heights, 18 mi away
58/100CR ScoreRanked #8 because of its Google rating and trade focus: 4.7★ from 1,936 Google reviews, listed on Google as “Pest control service”.
Based in Belleville, 19 mi away
57/100CR ScoreRanked #9 because of its Google rating and trade focus: 4.9★ from 115 Google reviews, listed on Google as “Pest control service”.
Based in St. Louis, 24 mi away
57/100CR ScoreRanked #10 because of its Google rating and trade focus: 4.9★ from 2,085 Google reviews, listed on Google as “Pest control service”.
Based in Olivette, 18 mi away
57/100CR ScoreRanked #11 because of its Google rating and trade focus: 4.4★ from 3,435 Google reviews, listed on Google as “Pest control service”.
Based in Clayton, 19 mi away
56/100CR ScoreRanked #12 because of its Google rating and trade focus: 5.0★ from 302 Google reviews, listed on Google as “Pest control service”.
Based in St. Louis, 16 mi away
56/100CR ScoreRanked #13 because of its Google rating and trade focus: 4.8★ from 111 Google reviews, listed on Google as “Pest control service”.
#14 Spring Green
Based in Saint Charles, 22 mi away
56/100CR ScoreRanked #14 because of its Google rating and trade focus: 4.9★ from 570 Google reviews, listed on Google as “Pest control service”.
Based in St. Louis, 21 mi away
56/100CR ScoreRanked #15 because of its Google rating and trade focus: 4.8★ from 79 Google reviews, listed on Google as “Pest control service”.
Based in Saint Peters, 22 mi away
55/100CR ScoreRanked #16 because of its Google rating and trade focus: 4.8★ from 578 Google reviews, listed on Google as “Pest control service”.
Based in St. Louis, 22 mi away
55/100CR ScoreRanked #17 because of its Google rating and trade focus: 4.9★ from 352 Google reviews, listed on Google as “Pest control service”.
Based in St. Louis, 17 mi away
55/100CR ScoreRanked #18 because of its Google rating and trade focus: 4.9★ from 50 Google reviews, listed on Google as “Pest control service”.
Based in St. Louis, 18 mi away
55/100CR ScoreRanked #19 because of its Google rating and trade focus: 4.7★ from 1,007 Google reviews, listed on Google as “Pest control service”.
Based in St. Louis, 19 mi away
54/100CR ScoreRanked #20 because of its Google rating and trade focus: 5.0★ from 303 Google reviews, listed on Google as “Pest control service”.
Based in St. Louis, 20 mi away
54/100CR ScoreRanked #21 because of its Google rating and trade focus: 4.8★ from 24 Google reviews, listed on Google as “Pest control service”.
Based in St. Louis, 18 mi away
54/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.8★ from 47 Google reviews, listed on Google as “Pest control service”.
Based in St. Louis, 18 mi away
54/100CR ScoreRanked #23 because of its Google rating and trade focus: 5.0★ from 71 Google reviews, listed on Google as “Pest control service”.
Based in Saint Charles, 24 mi away
54/100CR ScoreRanked #24 because of its Google rating and trade focus: 5.0★ from 419 Google reviews, listed on Google as “Pest control service”.
Based in St. Louis, 18 mi away
53/100CR ScoreRanked #25 because of its Google rating and trade focus: 4.3★ from 128 Google reviews, listed on Google as “Pest control service”.
How we ranked Alton pest control companies
We scored 74 Alton 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 Alton 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 Alton: frequently asked questions
Who is the best pest control company in Alton?
By CR Score, the highest-ranked pest control company in Alton, IL is Rottler Pest Solutions with a CR Score of 62/100. It has 4.9★ from 1,656 Google reviews. It is open 24/7. STL Pest Control (#2) and Rottler Pest Solutions (#3) follow. We ranked 74 pest control companies on ten factors, last updated November 3, 2026.
How many pest control companies are there in Alton?
ContractorsRanked ranks 74 pest control companies serving Alton, IL. Counts are as of November 2026.
Which pest control companies in Alton are open 24/7?
11 ranked pest control companies in Alton post 24/7 hours. The highest-ranked are Rottler Pest Solutions (#1), Rottler Pest Solutions (#3) and Rottler Pest Solutions (#4). Hours come from each business's Google listing as of November 2026, so call to confirm.
Which pest control companies in Alton work on weekends?
47 of 74 ranked pest control companies post Saturday hours and 22 post Sunday hours. The highest-ranked open Saturdays are Rottler Pest Solutions (#1), STL Pest Control (#2) and Rottler Pest Solutions (#3). Posted hours are office hours; crews may book weekend jobs separately.
What Google rating do Alton pest control companies have?
The median Google rating among 74 rated pest control companies in Alton is 4.9★, with a median of 41 reviews. Aptive Pest Control has the most, 6,236 reviews, and ranks #6. 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 Alton count in this ranking?
Yes, if they are within 25 mi of the Alton 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 Alton
- November 2026: CR Scores recalculated for 74 pest control companies serving Alton.
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