- Lundstrom Jewelers
- Lung Association
- Lupita's Beauty Salon
- Lupita's Mexican Restaurant
- LUSH
- Lutheran Brotherhood Financial Services
- Lutheran Child & Family Services
- Lutheran Community Services Northwest
- Lutheran Home
- Lutheran Services in Iowa
- Lutheran Social Services of Illinois
- Lutheran Social Services of Michigan
- LUV Homes
- Luxury Limousine
- Luxury Limousine Service
- Luxury Nails
- Luxury Perfumes
- LVI Environmental Services
- Lynch Construction
- Lynden Air Freight
- Lynn Housing Authority
- Lynn Nails
- Lynn's Beauty Salon
- Lynn's Nails
- Lyon Real Estate