- Ladders Wholesale, Cowansville
- Land Surveyor, Cowansville - Land Surveying Services
- Landscape Contractors & Designers, Cowansville
- Landscaping, Cowansville
- Language Schools, Cowansville
- Lawn Furnishings, Cowansville
- Lawyers & Attorneys, Cowansville
- Leather Goods Cleaners & Dyers, Cowansville
- Legal & Tax Services, Cowansville
- Legal Information & Referral Services, Cowansville
- Legal Professionals, Cowansville
- Letter Signs, Cowansville
- Libraries, Cowansville
- Lighting Fixtures & Equipment, Cowansville
- Liquor & Beer Manufacturers, Cowansville
|
- Liquor Stores, Cowansville
- Livestock, Cowansville
- Livestock Breeders, Cowansville
- Livestock Services, Cowansville
- Locks, Cowansville
- Locksmiths, Cowansville - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Cowansville
- Lodging, Cowansville
- Lodging Services, Cowansville
- Loggers, Cowansville
- Long Haul Trucking Companies, Cowansville
- Long Term Care Facility, Cowansville
- Lubricating Oils , Cowansville - Motor Oil
- Lumber & Wood Products Manufacturers, Cowansville
|
