- Laminating Machine, Supplies & Equipment, Ansonia
- Landscape Contractors & Designers, Ansonia
- Landscaping, Ansonia
- Late Night Restaurants, Ansonia
- Laundromats & Dry-Cleaning, Coin-Operated, Ansonia
- Laundry Self Service, Ansonia
- Lawn & Garden Equipment & Supplies, Ansonia
- Lawn & Garden Services, Ansonia
- Lawn Maintenance Services, Ansonia
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- Lawyers & Attorneys, Ansonia
- Legal Professionals, Ansonia
- Lighting Fixtures & Equipment, Ansonia
- Limousine Service, Ansonia
- Liquor Stores, Ansonia
- Locks, Ansonia
- Locksmiths, Ansonia - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Ansonia
- Long Haul Trucking Companies, Ansonia
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