- Laboratories Medical, Bethel Park
- Land Surveyor, Bethel Park - Land Surveying Services
- Landscape Contractors & Designers, Bethel Park
- Landscaping, Bethel Park
- Landscaping Materials & Supplies, Bethel Park
- Late Night Restaurants, Bethel Park
- Laundry Equipment Rental & Leasing, Bethel Park
- Laundry Self Service, Bethel Park
- Laundry Sewing & Repair, Bethel Park
- Lawn & Garden Decor & Ornaments, Bethel Park
- Lawn & Garden Equipment & Supplies, Bethel Park
- Lawn & Garden Services, Bethel Park
- Lawn & Tree Service, Bethel Park
- Lawn Maintenance Services, Bethel Park
- Lawn Mower Repair & Blade Sharpening Service, Bethel Park
- Lawn Mowers & Power Equipment, Bethel Park
- Lawyers & Attorneys, Bethel Park
- Leather Goods Cleaners & Dyers, Bethel Park
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- Legal & Tax Services, Bethel Park
- Legal Professionals, Bethel Park
- Libraries, Bethel Park
- Life Insurance, Bethel Park
- Linens, Bethel Park
- Liquor Stores, Bethel Park
- Live Theaters, Bethel Park
- Loans Personal, Bethel Park
- Locksmiths, Bethel Park - Residence, Commercial, Safe & Auto Car Locksmith
- Lodging, Bethel Park
- Long Haul Trucking Companies, Bethel Park
- Long Term Care Facility, Bethel Park
- Luggage & Accessories , Bethel Park
- Lumber & Lumber Products, Bethel Park
- Lumber & Lumber Products, Bethel Park
- Lumber Companies, Bethel Park - Wholesale, Manufacturers & Suppliers
- Lutheran Church, Bethel Park
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