- Machinery, Supplies & Equipment - Business Supplies Related, New Milford
- Machinery, Supplies & Equipment - Construction & Contractor Related, New Milford
- Magazine & Newspaper Stands, New Milford - Dealers & Distributors
- Major Appliances, New Milford - Household & Kitchen
- Management Consultants & Services, New Milford
- Manicurists & Pedicurists, New Milford
- Manufacturing, New Milford
- Martial Arts & Self Defense Schools, New Milford
- Meat Market, Wholesale & Products, New Milford
- Medical & Dental Management, New Milford
- Medical Supplies & Equipment, New Milford
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- Mediterranean Restaurants, New Milford
- Mental Health Specialists, New Milford - Psychologist, Psychiatrist, Psychotherapist, etc
- Mexican Restaurants, New Milford
- Miscellaneous Government, New Milford
- Miscellaneous Personal Services, New Milford
- Miscellaneous Professional, New Milford
- Mortgage Bankers & Correspondents, New Milford
- Mortgages & Loans, New Milford
- Motor Vehicle, New Milford
- Musical Instruments Repair, Sales & Service, New Milford
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