- Labor Organizations, Belleville
- Laboratories Dental, Belleville
- Laboratories Medical, Belleville
- Land Consultants, Belleville
- Land Surveyor, Belleville - Land Surveying Services
- Landscape Contractors & Designers, Belleville
- Landscaping, Belleville
- Landscaping Materials & Supplies, Belleville
- Language Schools, Belleville
- Laser Therapy Clinics, Belleville
- Laundromats & Dry-Cleaning, Coin-Operated, Belleville
- Laundry Self Service, Belleville
- Lawn & Garden Chemicals, Insecticides & Fertilizers, Belleville
- Lawn & Garden Equipment & Supplies, Belleville
- Lawn & Garden Services, Belleville
- Lawn & Garden Sprinkler Systems, Belleville
- Lawn Maintenance Services, Belleville
- Lawn Mowers & Power Equipment, Belleville
- Lawn Mowers Sharpening Equipment, Belleville
- Lawyers & Attorneys, Belleville
- Legal & Tax Services, Belleville
- Legal Clinics, Belleville
- Legal Information & Referral Services, Belleville
- Legal Professionals, Belleville
- Letter Signs, Belleville
- Libraries, Belleville
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- Life Insurance, Belleville
- Lift Trucks, Belleville
- Lighting Fixtures & Equipment, Belleville
- Limousine Service, Belleville
- Linens, Belleville
- Lingerie & Underwear for Women, Belleville - Bras, Panties, Bustiers, Corsets & More
- Liquid Waste Removal, Belleville
- Liquor Stores, Belleville
- Live Theaters, Belleville
- Livestock, Belleville
- Loans Personal, Belleville
- Local & Short Haul Trucking Companies, Belleville
- Locks, Belleville
- Locksmiths, Belleville - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Belleville
- Lodging, Belleville
- Lodging Services, Belleville
- Loggers, Belleville
- Long Haul Trucking Companies, Belleville
- Lottery Game Retailers, Belleville
- Lp Gas Equipment & Supplies, Belleville
- Lubricating Oils , Belleville - Motor Oil
- Luggage & Accessories , Belleville
- Lumber & Lumber Products, Belleville
- Lumber & Lumber Products, Belleville
- Lutheran Church, Belleville
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