- Laboratories Dental, Tolland
- Laboratories Medical, Tolland
- Land Surveyor, Tolland - Land Surveying Services
- Landscape Contractors & Designers, Tolland
- Landscaping, Tolland
- Lawn & Garden Equipment & Supplies, Tolland
- Lawn & Garden Services, Tolland
- Lawn Maintenance Services, Tolland
- Lawn Mower Repair & Blade Sharpening Service, Tolland
- Lawn Mowers & Power Equipment, Tolland
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- Lawyers & Attorneys, Tolland
- Leather Goods Cleaners & Dyers, Tolland
- Legal Professionals, Tolland
- Liquor Stores, Tolland
- Locks, Tolland
- Locksmiths, Tolland - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Tolland
- Lodging, Tolland
- Long Haul Trucking Companies, Tolland
- Lumber Companies, Tolland - Wholesale, Manufacturers & Suppliers
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