- Labor & Employment Consultants, Wellesley
- Lamp Repair, Wellesley
- Landscape Contractors & Designers, Wellesley
- Landscape Lighting, Wellesley
- Landscaping, Wellesley
- Late Night Restaurants, Wellesley
- Lawn & Garden Equipment & Supplies, Wellesley
- Lawn & Garden Services, Wellesley
- Lawn & Garden Sprinkler Systems, Wellesley
- Lawn Maintenance Services, Wellesley
- Lawyers & Attorneys, Wellesley
- Legal Professionals, Wellesley
- Libraries, Wellesley
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- Lighting Fixtures & Equipment, Wellesley
- Limousine Service, Wellesley
- Linens, Wellesley
- Live Theaters, Wellesley
- Loans Personal, Wellesley
- Locks, Wellesley
- Locksmiths, Wellesley - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Wellesley
- Lodging, Wellesley
- Luggage & Accessories , Wellesley
- Lumber & Lumber Products, Wellesley
- Lumber & Lumber Products, Wellesley
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