- Labor Organizations, Collegeville
- Labor Unions, Collegeville
- Laboratories Medical, Collegeville
- Land Surveyor, Collegeville - Land Surveying Services
- Landscape Contractors & Designers, Collegeville
- Landscaping, Collegeville
- Landscaping Materials & Supplies, Collegeville
- Laser Hair Removal, Collegeville
- Late Night Restaurants, Collegeville
- Lawn & Garden Equipment & Supplies, Collegeville
- Lawn & Garden Services, Collegeville
- Lawn Maintenance Services, Collegeville
- Lawn Mowers & Power Equipment, Collegeville
- Lawyers & Attorneys, Collegeville
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- Lead Inspection, Testing & Consulting, Collegeville - Lead Paint
- Lead Testing, Detection & Removal - Commercial & Industrial, Collegeville - Lead Paint
- Lead Testing, Detection & Removal - Residential, Collegeville - Lead Paint
- Legal Professionals, Collegeville
- Life Insurance, Collegeville
- Limousine Service, Collegeville
- Liquor Stores, Collegeville
- Livestock, Collegeville
- Loans Personal, Collegeville
- Local & Short Haul Trucking Companies, Collegeville
- Locksmiths, Collegeville - Residence, Commercial, Safe & Auto Car Locksmith
- Lodging, Collegeville
- Long Haul Trucking Companies, Collegeville
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