- Labels & Tags, Rowlett
- Laboratories Dental, Rowlett
- Laboratories Medical, Rowlett
- Land Surveyor, Rowlett - Land Surveying Services
- Landscape Contractors & Designers, Rowlett
- Landscaping, Rowlett
- Late Night Restaurants, Rowlett
- Latin American Restaurants, Rowlett
- Laundry Self Service, Rowlett
- Lawn & Garden Chemicals, Insecticides & Fertilizers, Rowlett
- Lawn & Garden Equipment & Supplies, Rowlett
- Lawn & Garden Services, Rowlett
- Lawn & Garden Sprinkler Systems, Rowlett
- Lawn Maintenance Services, Rowlett
- Lawn Mowers & Power Equipment, Rowlett
- Lawyers & Attorneys, Rowlett
- Legal & Tax Services, Rowlett
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- Legal Information Service, Rowlett
- Legal Professionals, Rowlett
- Life Insurance, Rowlett
- Lighting Fixtures & Equipment, Rowlett
- Limousine Service, Rowlett
- Live Theaters, Rowlett
- Loans Check Cashing, Rowlett
- Loans Personal, Rowlett
- Locks, Rowlett
- Locksmiths, Rowlett - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Rowlett
- Lodging, Rowlett
- Lodging Services, Rowlett
- Long Haul Trucking Companies, Rowlett
- Lumber & Lumber Products, Rowlett
- Lumber & Lumber Products, Rowlett
- Lutheran Church, Rowlett
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