- Machine Shop & Tool Repair Service, Ludington
- Machinery Repair & Rebuild, Ludington
- Machinery, Supplies & Equipment - Business Production Related, Ludington
- Machinery, Supplies & Equipment - Business Supplies Related, Ludington
- Machinery, Supplies & Equipment - Construction & Contractor Related, Ludington
- Magazine & Newspaper Stands, Ludington - Dealers & Distributors
- Major Appliances, Ludington - Household & Kitchen
- Management Consultants & Services, Ludington
- Manicurists & Pedicurists, Ludington
- Manufacturing, Ludington
- Manufacturing Products, Ludington
- Marinas & Marina Services, Ludington
- Marine Contractors & Designers, Ludington
- Marine Products And Services, Ludington
- Marine Repair & Service Stations, Ludington
- Marine Supplies & Equipment Repair, Ludington - Boat Supplies & Equipment
- Marriage & Family Counselors, Ludington
- Martial Arts & Self Defense Schools, Ludington
- Masonry Materials & Supplies, Ludington
- Massage Therapists & Professional, Ludington
- Massage Therapy, Ludington
- Material Handling Equipment, Ludington - Conveyor Belt, Pallet Jack, Forklift, etc
- Maternity Clothes & Clothing Stores, Ludington - Maternity Dress, Gown, Swimwear, Underwear & More
- Meat Market, Wholesale & Products, Ludington
- Medical Equipment Manufacturers, Ludington
- Medical Supplies & Equipment, Ludington
- Membership Sports & Recreation Clubs, Ludington
- Men's Clothing Stores, Ludington - Clothes & Accessories
- Mental Health Clinics, Ludington - Treatment Centers
- Mental Health Specialists, Ludington - Psychologist, Psychiatrist, Psychotherapist, etc
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- Metal Working Machinery, Ludington
- Methodist Church, Ludington
- Mexican Restaurants, Ludington
- Microwave Oven Repair & Service, Ludington
- Mill Supply & Equipment, Ludington
- Mini & Self Storage, Ludington
- Mini Golf Courses, Ludington
- Mining, Ludington
- Mirrors, Ludington - Custom, Framed, Bathroom, Vanity & Wall Mirrors
- Miscellaneous Agriculture, Ludington
- Miscellaneous Government, Ludington
- Miscellaneous Manufacturing, Ludington
- Miscellaneous Personal Services, Ludington
- Miscellaneous Professional, Ludington
- Mobile Home Parks & Communities , Ludington
- Monuments, Tombstones, Markers & Memorials, Ludington
- Mortgage Bankers & Correspondents, Ludington
- Motor Vehicle, Ludington
- Motor Vehicle Rental & Leasing, Ludington
- Motorcycle Parts, Accessories & Dealers, Ludington
- Moving & Storage Supplies & Equipment, Ludington
- Moving Companies, Ludington
- Moving Supplies & Equipment Rental, Ludington
- Moving Truck Rental , Ludington
- Muffler Shop & Exhaust Systems, Ludington
- Museums, Ludington
- Music, Ludington
- Musical Instrument Rental, Ludington - Band & Orchestra Instruments
- Musical Instruments & Equipment Stores, Ludington
- Musical Instruments Repair, Sales & Service, Ludington
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