- Machine Shop, Metropolis
- Machine Shop & Tool Repair Service, Metropolis
- Machinery, Supplies & Equipment - Business Production Related, Metropolis
- Machinery, Supplies & Equipment - Business Supplies Related, Metropolis
- Machinery, Supplies & Equipment - Construction & Contractor Related, Metropolis
- Management Consultants & Services, Metropolis
- Manufacturing, Metropolis
- Manufacturing Products, Metropolis
- Masonry Materials & Supplies, Metropolis
- Medical & Health Service Organizations, Metropolis
- Membership Sports & Recreation Clubs, Metropolis
- Men's Clothing Stores, Metropolis - Clothes & Accessories
- Mental Health Clinics, Metropolis - Treatment Centers
- Merchandise Sales Events, Metropolis
- Methodist Church, Metropolis
- Mexican Restaurants, Metropolis
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- Mini & Self Storage, Metropolis
- Ministries Church, Metropolis
- Miscellaneous Business Services, Metropolis
- Miscellaneous Government, Metropolis
- Miscellaneous Manufacturing, Metropolis
- Miscellaneous Personal Services, Metropolis
- Miscellaneous Professional, Metropolis
- Mortgage Bankers & Correspondents, Metropolis
- Motor Vehicle, Metropolis
- Motor Vehicle Rental & Leasing, Metropolis
- Motorcycle & ATV Repair & Service, Metropolis
- Motorcycle Repair & Service, Metropolis
- Moving Supplies & Equipment Rental, Metropolis
- Moving Truck Rental , Metropolis
- Mulch, Peat & Moss Products, Metropolis
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