- Labor Organizations, Fitchburg
- Labor Unions, Fitchburg
- Laboratories Dental, Fitchburg
- Laboratories Medical, Fitchburg
- Landscape Contractors & Designers, Fitchburg
- Landscape Garden Services, Fitchburg
- Landscaping, Fitchburg
- Late Night Restaurants, Fitchburg
- Laundry Self Service, Fitchburg
- Lawn & Garden Equipment & Supplies, Fitchburg
- Lawn & Garden Services, Fitchburg
- Lawn Mower Repair & Blade Sharpening Service, Fitchburg
- Lawn Mowers & Power Equipment, Fitchburg
- Lawyers & Attorneys, Fitchburg
- Leather Goods Cleaners & Dyers, Fitchburg
- Legal & Tax Services, Fitchburg
|
- Legal Professionals, Fitchburg
- Limousine Service, Fitchburg
- Liquor & Beer Manufacturers, Fitchburg
- Liquor Stores, Fitchburg
- Live Theaters, Fitchburg
- Loans Personal, Fitchburg
- Local & Short Haul Trucking Companies, Fitchburg
- Locks, Fitchburg
- Locksmiths, Fitchburg - Residence, Commercial, Safe & Auto Car Locksmith
- Locksmiths Equipment & Supplies, Fitchburg
- Lodging, Fitchburg
- Long Haul Trucking Companies, Fitchburg
- Lottery Game Retailers, Fitchburg
- Lumber Companies, Fitchburg - Wholesale, Manufacturers & Suppliers
- Lutheran Church, Fitchburg
|