- Laboratories Dental, Airdrie
- Laboratories Medical, Airdrie
- Land Consultants, Airdrie
- Land Surveyor, Airdrie - Land Surveying Services
- Landscape Contractors & Designers, Airdrie
- Landscaping, Airdrie
- Landscaping Materials & Supplies, Airdrie
- Laser Hair Removal, Airdrie
- Laser Therapy Clinics, Airdrie
- Latin American Restaurants, Airdrie
- Laundromats & Dry-Cleaning, Coin-Operated, Airdrie
- Lawn & Garden Equipment & Supplies, Airdrie
- Lawn & Garden Services, Airdrie
- Lawn Maintenance Services, Airdrie
- Lawn Mowers & Power Equipment, Airdrie
- Lawyers & Attorneys, Airdrie
- Legal & Tax Services, Airdrie
- Legal Professionals, Airdrie
- Libraries, Airdrie
- License & Registry Services, Airdrie
- Life Insurance, Airdrie
- Lighting Fixtures & Equipment, Airdrie
- Limousine Service, Airdrie
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- Lingerie & Underwear for Women, Airdrie - Bras, Panties, Bustiers, Corsets & More
- Liquid Filters, Airdrie
- Liquid Transportation - Non Hazardous, Airdrie
- Liquor & Beer Manufacturers, Airdrie
- Liquor Stores, Airdrie
- Live Theaters, Airdrie
- Livestock, Airdrie
- Livestock Dealers, Airdrie
- Livestock Services, Airdrie
- Livestock Trailers, Airdrie
- Loans Personal, Airdrie
- Locks, Airdrie
- Locksmiths, Airdrie - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Airdrie
- Lodging, Airdrie
- Lodging Services, Airdrie
- Log Homes - Log Cabins Builders, Airdrie - Building Contractors
- Long Haul Trucking Companies, Airdrie
- Lumber & Lumber Products, Airdrie
- Lumber & Lumber Products, Airdrie
- Lumber Companies, Airdrie - Wholesale, Manufacturers & Suppliers
- Lutheran Church, Airdrie
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