- Landscape Contractors & Designers, Madelia
- Landscaping, Madelia
- Lawn & Garden Chemicals, Insecticides & Fertilizers, Madelia
- Lawn & Garden Equipment & Supplies, Madelia
- Lawn Mowers & Power Equipment, Madelia
- Lawyers & Attorneys, Madelia
- Legal Professionals, Madelia
- Libraries, Madelia
- Liquor Stores, Madelia
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- Loans Personal, Madelia
- Locks, Madelia
- Locksmiths, Madelia - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Madelia
- Lodging, Madelia
- Long Haul Trucking Companies, Madelia
- Lumber & Lumber Products, Madelia
- Lumber & Lumber Products, Madelia
- Lutheran Church, Madelia
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