- Labor & Employment Consultants, Boulder City
- Labor Relations Counselors, Boulder City
- Land Companies, Boulder City
- Land Surveyor, Boulder City - Land Surveying Services
- Landscape Contractors & Designers, Boulder City
- Landscaping, Boulder City
- Late Night Restaurants, Boulder City
- Laundry Self Service, Boulder City
- Lawn & Garden Equipment & Supplies, Boulder City
- Lawn & Garden Services, Boulder City
- Lawn Maintenance Services, Boulder City
- Lawyers & Attorneys, Boulder City
- Legal & Tax Services, Boulder City
- Legal Professionals, Boulder City
- Libraries, Boulder City
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- Licensed Counselors, Boulder City
- Life Insurance, Boulder City
- Liquor & Beer Manufacturers, Boulder City
- Liquor Stores, Boulder City
- Live Theaters, Boulder City
- Loans Personal, Boulder City
- Loans Title Services, Boulder City
- Locks, Boulder City
- Locksmiths, Boulder City - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Boulder City
- Lodging, Boulder City
- Long Haul Trucking Companies, Boulder City
- Lumber & Lumber Products, Boulder City
- Lutheran Church, Boulder City
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