- Lamp Shades, Lambertville
- Lamps & Lamp Shades Retail, Lambertville - Desk, Table & Floor Lamps
- Land Surveyor, Lambertville - Land Surveying Services
- Landscape Contractors & Designers, Lambertville
- Landscape Lighting, Lambertville
- Landscaping, Lambertville
- Landscaping Materials & Supplies, Lambertville
- Laundry Self Service, Lambertville
- Lawn & Garden Equipment & Supplies, Lambertville
- Lawn & Garden Services, Lambertville
- Lawn Maintenance Services, Lambertville
- Lawn Mower Repair & Blade Sharpening Service, Lambertville
- Lawyers & Attorneys, Lambertville
- Leather Apparel Goods Manufacturers, Lambertville
- Leather Goods, Lambertville
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- Leather Goods Cleaners & Dyers, Lambertville
- Legal Marketing Service, Lambertville
- Legal Professionals, Lambertville
- Libraries, Lambertville
- Lighting Fixtures & Equipment, Lambertville
- Liquor Stores, Lambertville
- Locks, Lambertville
- Locksmiths, Lambertville - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Lambertville
- Lodging, Lambertville
- Long Haul Trucking Companies, Lambertville
- Luggage & Accessories , Lambertville
- Luncheonette Restaurants, Lambertville
- Lutheran Church, Lambertville
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