- Labor Organizations, Laconia
- Laboratories Dental, Laconia
- Laboratories Medical, Laconia
- Land Surveyor, Laconia - Land Surveying Services
- Landscape Contractors & Designers, Laconia
- Landscaping, Laconia
- Late Night Restaurants, Laconia
- Lawn & Garden Equipment & Supplies, Laconia
- Lawn & Garden Services, Laconia
- Lawn Hydroseeding, Laconia
- Lawn Mowers & Power Equipment, Laconia
- Lawyers & Attorneys, Laconia
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- Legal Professionals, Laconia
- Libraries, Laconia
- Liquor Stores, Laconia
- Loans Personal, Laconia
- Locks, Laconia
- Locksmiths, Laconia - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Laconia
- Lodging, Laconia
- Log Homes - Log Cabins Builders, Laconia - Building Contractors
- Lumber & Lumber Products, Laconia
- Lumber & Lumber Products, Laconia
- Lutheran Church, Laconia
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