- Labor Organizations, Davis
- Laboratories Biological, Davis
- Laboratories Dental, Davis
- Laboratories Medical, Davis
- Land Surveyor, Davis - Land Surveying Services
- Landscape Contractors & Designers, Davis
- Landscape Garden Services, Davis
- Landscaping, Davis
- Late Night Restaurants, Davis
- Laundromats & Dry-Cleaning, Coin-Operated, Davis
- Lawn & Garden Equipment & Supplies, Davis
- Lawn & Garden Services, Davis
- Lawn Furnishings, Davis
- Lawn Maintenance Services, Davis
- Lawn Mower Repair & Blade Sharpening Service, Davis
- Lawn Mowers & Power Equipment, Davis
- Lawyers & Attorneys, Davis
- Leather Goods & Luggage Repair, Davis
- Leather Goods Cleaners & Dyers, Davis
- Legal & Tax Services, Davis
- Legal Professionals, Davis
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- Legislative Analysts & Consultants, Davis
- Libraries, Davis
- License Services, Davis
- Life Insurance, Davis
- Limousine Service, Davis
- Liquor Stores, Davis
- Livestock, Davis
- Livestock Dealers, Davis
- Loans Personal, Davis
- Local & Short Haul Trucking Companies, Davis
- Locks, Davis
- Locksmiths, Davis - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Davis
- Lodging, Davis
- Lodging Services, Davis
- Logistics Freight, Davis
- Long Haul Trucking Companies, Davis
- Lumber & Lumber Products, Davis
- Lumber & Lumber Products, Davis
- Lutheran Church, Davis
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