- Machinery, Supplies & Equipment - Construction & Contractor Related, Lagrangeville
- Mail Delivery Service, Lagrangeville
- Mailing List Service, Brokers & Compilers, Lagrangeville
- Management Consultants & Services, Lagrangeville
- Manicurists & Pedicurists, Lagrangeville
- Martial Arts & Self Defense Schools, Lagrangeville
- Massage Therapists & Professional, Lagrangeville
- Massage Therapy, Lagrangeville
- Meeting & Event Planning Services, Lagrangeville - Conference Consultants
- Membership Sports & Recreation Clubs, Lagrangeville
- Mental Health Clinics, Lagrangeville - Treatment Centers
- Mental Health Specialists, Lagrangeville - Psychologist, Psychiatrist, Psychotherapist, etc
- Methodist Church, Lagrangeville
- Mini & Self Storage, Lagrangeville
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- Miscellaneous Government, Lagrangeville
- Miscellaneous Personal Services, Lagrangeville
- Mortgage Bankers & Correspondents, Lagrangeville
- Mortgages & Loans, Lagrangeville
- Motion Picture Pre & Post Production Services, Lagrangeville
- Motor Vehicle, Lagrangeville
- Moving Companies, Lagrangeville
- Music, Lagrangeville
- Music Entertainment, Lagrangeville
- Music Lessons, Lagrangeville
- Music Lessons - Instrumental, Lagrangeville
- Musical Instrument Rental, Lagrangeville - Band & Orchestra Instruments
- Musical Recording Services, Lagrangeville
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