- Machine Shop, Deer River
- Machinery, Supplies & Equipment - Business Production Related, Deer River
- Machinery, Supplies & Equipment - Construction & Contractor Related, Deer River
- Mail Delivery Service, Deer River
- Major Appliances, Deer River - Household & Kitchen
- Manufacturing, Deer River
- Masonry Contractors, Deer River - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Deer River
- Meat Market, Wholesale & Products, Deer River
- Membership Sports & Recreation Clubs, Deer River
- Methodist Church, Deer River
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- Miscellaneous Business Services, Deer River
- Miscellaneous Government, Deer River
- Miscellaneous Industry, Deer River
- Miscellaneous Professional, Deer River
- Mortgage Bankers & Correspondents, Deer River
- Mortgage Contracts & Services, Deer River
- Motor Vehicle, Deer River
- Motor Vehicle Rental & Leasing, Deer River
- Moving Supplies & Equipment Rental, Deer River
- Moving Truck Rental , Deer River
- Muffler Shop & Exhaust Systems, Deer River
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