- Lighthouse
- Linden Bulk Transportation Co
- Linke Printing Inc
- Linn H Carleton DO
- Linn H Carleton DO
- Lisa's Pizza
- Lithuanian Music Hall
- Lithuanian Republican Club
- Little Dave's Seafood
- Little Johnny's Auto World Inc
- Little Lous
- Loco Dollar Inc
- Logan Deck
- Lomax Rug Co Inc
- Lomax-Carpet Mart
- London Creative Floral Dsgnrs
- London Wreath Co
- Look Auto Sales
- Lou's Place
- Louis Garzone Funeral Home
- Luciano Grocery
- Lucky Cash LLC
- Lucky Cash LLC
- Lucky's Hardwood Floor
- Luithlen Dye Corp
- Luv Made Crafts
- M & M Autobody
- M & M Clothing
- M & S Appliances
- M & T Bank
- M & V Beer Distributors
- M D Roofing & Siding
- M F Stein Corp
- M H Auto Body
- M J Inc
- M Louis Van De Beek MD
- Mab Paints
- Macko's Cafe
- Madeline's Beauty Salon
- Madeos T
- Madison Athletic Assn
