- Lamp Shades, Petersburg
- Lamps & Lamp Shades Retail, Petersburg - Desk, Table & Floor Lamps
- Land Surveyor, Petersburg - Land Surveying Services
- Lawn & Garden Equipment & Supplies, Petersburg
- Lawn Mowers & Power Equipment, Petersburg
- Lawyers & Attorneys, Petersburg
- Legal Professionals, Petersburg
- Libraries, Petersburg
- Life Insurance, Petersburg
- Lime & Limestone, Petersburg
- Livestock, Petersburg
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- Loans Personal, Petersburg
- Local & Short Haul Trucking Companies, Petersburg
- Locks, Petersburg
- Locksmiths, Petersburg - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Petersburg
- Lodging, Petersburg
- Long Haul Trucking Companies, Petersburg
- Lubricating Oils , Petersburg - Motor Oil
- Lumber & Wood Products Manufacturers, Petersburg
- Lumber Companies, Petersburg - Wholesale, Manufacturers & Suppliers
- Lutheran Church, Petersburg
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