- Machine Shop & Tool Repair Service, Margaretville
- Machinery, Supplies & Equipment - Business Supplies Related, Margaretville
- Manufacturing, Margaretville
- Marriage & Family Counselors, Margaretville
- Masonry Materials & Supplies, Margaretville
- Massage Therapists & Professional, Margaretville
- Massage Therapy, Margaretville
- Mental Health Specialists, Margaretville - Psychologist, Psychiatrist, Psychotherapist, etc
- Merchandise Sales Events, Margaretville
- Methodist Church, Margaretville
- Mini & Self Storage, Margaretville
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- Miscellaneous Professional, Margaretville
- Mortgage Bankers & Correspondents, Margaretville
- Motor Vehicle, Margaretville
- Motor Vehicle Rental & Leasing, Margaretville
- Movie Theaters, Margaretville
- Moving Supplies & Equipment Rental, Margaretville
- Moving Truck Rental , Margaretville
- Music, Margaretville
- Musical Instruments & Equipment Stores, Margaretville
- Musical Instruments - Guitars, Margaretville
- Musical Instruments Repair, Sales & Service, Margaretville
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