- Labels & Tags, Collinsville
- Laboratories Dental, Collinsville
- Laboratories Medical, Collinsville
- Landscape Contractors & Designers, Collinsville
- Landscaping, Collinsville
- Lawn & Garden Chemicals, Insecticides & Fertilizers, Collinsville
- Lawn Mower Repair & Blade Sharpening Service, Collinsville
- Lawyers & Attorneys, Collinsville
- Legal Professionals, Collinsville
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- License Services, Collinsville
- Life Insurance, Collinsville
- Livestock, Collinsville
- Livestock Equipment & Supplies, Collinsville
- Loans Personal, Collinsville
- Locks, Collinsville
- Locksmiths, Collinsville - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Collinsville
- Long Haul Trucking Companies, Collinsville
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