- Labels & Tags, Hartford
- Landscape Contractors & Designers, Hartford
- Landscaping, Hartford
- Laser Cutting Manufacturers, Hartford
- Late Night Restaurants, Hartford
- Laundromats & Dry-Cleaning, Coin-Operated, Hartford
- Laundry Self Service, Hartford
- Lawn & Garden Equipment & Supplies, Hartford
- Lawn & Garden Services, Hartford
- Lawn Maintenance Services, Hartford
- Lawn Mowers & Power Equipment, Hartford
- Lawn Mowers Rental & Leasing, Hartford
- Lawyers & Attorneys, Hartford
- Legal Professionals, Hartford
- Liquor Stores, Hartford
- Live Theaters, Hartford
- Livestock, Hartford
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- Livestock Auctions, Hartford
- Livestock Auctions, Hartford
- Loans Check Cashing, Hartford
- Loans Personal, Hartford
- Local & Short Haul Trucking Companies, Hartford
- Locks, Hartford
- Locksmiths, Hartford - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Hartford
- Lodging, Hartford
- Lodging Services, Hartford
- Long Haul Trucking Companies, Hartford
- Lubricating Oils , Hartford - Motor Oil
- Lumber & Lumber Products, Hartford
- Lumber & Lumber Products, Hartford
- Lumber Companies, Hartford - Wholesale, Manufacturers & Suppliers
- Lutheran Church, Hartford
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