Lead directory · Ontario

Local business leads in Thornhill, ON

665 Thornhill businesses across 11 trades and services — phone numbers, 95 email addresses and Google ratings.

Search Thornhill freeBrowse by trade
665
businesses
100%
have a phone number
14%
have an email address (95)
—
average Google rating
By trade

What's in Thornhill

TradeBusinessesWith emailAvg ratingNo website
Construction companies26236—159
Medical clinics13620—67
Law firms11718—49
Dental clinics7111—37
Cleaning companies344—18
Landscaping companies283—16
Electrical contractors193—13
HVAC companies184—11
Plumbing companies162—6
Painting companies92—5
Roofing companies20—1
The market

Thornhill at a glance

665 local service businesses in Thornhill in our database, refreshed October 2026.
14% publish an email address — 95 you can reach by cold email.
359 have no website listed and 665 have no Google rating yet.
0% of rated businesses hold 4.5★ or better.

Area codes

  • (905)480
  • (416)90
  • (647)64
  • (289)23
  • (855)3
  • (888)1

A few Thornhill businesses

  1. Matlis Medical, Urgent Walk in Clinic, Sports MedicineMedical
  2. HealthMax Physiotherapy - ThornhillMedical
  3. The Fireplace ClubConstruction, HVAC
  4. Jacobson & AssociatesLegal
  5. Kva Electrical Systems LtdConstruction
  6. Honest Business PeopleLegal
  7. ES HVAC Design & ServiceConstruction
  8. Centre St. Denture ClinicDental
Reaching out in CanadaCold email to Canadian businesses falls under CASL, and phone outreach falls under the CRTC's telemarketing rules. A business address that's published publicly can support implied consent for messages relevant to that business, but every email still needs your identity and a working unsubscribe. Read our plain-English CASL guide and cold-calling rules before your first campaign.

Nearby in Ontario

TorontoMississaugaOttawaNorth YorkBramptonLondonScarboroughMarkhamOakvilleWindsorAll cities →

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