- Machine Shop & Tool Repair Service, Petoskey
- Machinery And Equipment Manufacturers, Petoskey
- Machinery, Supplies & Equipment - Business Production Related, Petoskey
- Machinery, Supplies & Equipment - Business Supplies Related, Petoskey
- Machinery, Supplies & Equipment - Construction & Contractor Related, Petoskey
- Magazine & Newspaper Stands, Petoskey - Dealers & Distributors
- Mailbox Rental Services, Petoskey
- Mailing, Delivery & Courier Service, Petoskey
- Maintenance, Cleaning & Sanitation, Petoskey
- Major Appliances, Petoskey - Household & Kitchen
- Management Consultants & Services, Petoskey
- Manicurists & Pedicurists, Petoskey
- Manufacturing, Petoskey
- Manufacturing Products, Petoskey
- Marinas & Marina Services, Petoskey
- Marine Electronic Equipment, Petoskey
- Marine Pilot & Operator Service, Petoskey
- Marine Products And Services, Petoskey
- Marine Services, Petoskey
- Marine Supplies & Equipment, Petoskey - Boat Supplies
- Marriage & Family Counselors, Petoskey
- Masonry Contractors, Petoskey - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Petoskey
- Massage Therapy, Petoskey
- Meat Market, Wholesale & Products, Petoskey
- Mechanical Contractors, Petoskey - Install, Service & Repair
- Medical Equipment Manufacturers, Petoskey
- Medical Supplies & Equipment, Petoskey
- Membership Sports & Recreation Clubs, Petoskey
- Men's & Boys Clothing & Accessories Stores, Petoskey
- Mens & Boys Belts & Suspenders, Petoskey
- Mens & Boys Jeans & Western Wear Stores, Petoskey
- Mental Health Clinics, Petoskey - Treatment Centers
- Mental Health Specialists, Petoskey - Psychologist, Psychiatrist, Psychotherapist, etc
- Merchandising & Marketing Consultants, Petoskey
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- Metal Repair Service & Blacksmith, Petoskey - Iron Works
- Methodist Church, Petoskey
- Mexican Restaurants, Petoskey
- Mildew Removal & Control, Petoskey - Mold Removal
- Mini & Self Storage, Petoskey
- Mini Golf Courses, Petoskey
- Mining, Petoskey
- Miscellaneous Business Product Repair, Petoskey
- Miscellaneous Retail Stores, Petoskey
- Miscellaneous Government, Petoskey
- Miscellaneous Industry, Petoskey
- Miscellaneous Personal Services, Petoskey
- Miscellaneous Professional, Petoskey
- Mission Churches, Petoskey
- Mobile Home Parks & Communities , Petoskey
- Money Transfer Service, Petoskey
- Monuments, Tombstones, Markers & Memorials, Petoskey
- Mortgage Bankers & Correspondents, Petoskey
- Motor Vehicle, Petoskey
- Motor Vehicle Rental & Leasing, Petoskey
- Motorcycle & Motor Scooters Dealers, Repair & Service, Petoskey
- Motorcycle Parts, Accessories & Dealers, Petoskey
- Motorcycle Repair & Service, Petoskey
- Moving & Storage Supplies & Equipment, Petoskey
- Moving Companies, Petoskey
- Moving Supplies & Equipment Rental, Petoskey
- Moving Truck Rental , Petoskey
- Muffler Shop & Exhaust Systems, Petoskey
- Museums, Petoskey
- Music, Petoskey
- Music Entertainment, Petoskey
- Musical Instrument Rental, Petoskey - Band & Orchestra Instruments
- Musical Instruments & Equipment Stores, Petoskey
- Musical Recording Services, Petoskey
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