- Labor & Employment Consultants, Evanston
- Laboratories Dental, Evanston
- Laboratories Medical, Evanston
- Land Surveyor, Evanston - Land Surveying Services
- Landscape Contractors & Designers, Evanston
- Landscaping, Evanston
- Landscaping Materials & Supplies, Evanston
- Late Night Restaurants, Evanston
- Lawn & Garden Equipment & Supplies, Evanston
- Lawn & Garden Services, Evanston
- Lawn Maintenance Services, Evanston
- Lawn Mowers & Power Equipment, Evanston
- Lawyers & Attorneys, Evanston
- Leather Goods & Luggage Repair, Evanston
- Legal & Tax Services, Evanston
- Legal Clinics, Evanston
- Legal Professionals, Evanston
- Libraries, Evanston
- Life Insurance, Evanston
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- Lighting Consultants, Evanston
- Lighting Contractors, Evanston
- Lighting Fixtures & Equipment, Evanston
- Lighting Fixtures Repair, Maintenance & Installation, Evanston
- Limousine Service, Evanston
- Linen Supply Services, Evanston
- Liquor & Beer Manufacturers, Evanston
- Liquor Stores, Evanston
- Live Theaters, Evanston
- Loans Personal, Evanston
- Locks, Evanston
- Locksmiths, Evanston - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Evanston
- Lodging, Evanston
- Lodging Services, Evanston
- Long Haul Trucking Companies, Evanston
- Lumber & Lumber Products, Evanston
- Lumber & Lumber Products, Evanston
- Lutheran Church, Evanston
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