- Machinery, Supplies & Equipment - Business Production Related, Boonville
- Machinery, Supplies & Equipment - Construction & Contractor Related, Boonville
- Manufacturing, Boonville
- Masonry Materials & Supplies, Boonville
- Mental Health Clinics, Boonville - Treatment Centers
- Mental Health Specialists, Boonville - Psychologist, Psychiatrist, Psychotherapist, etc
- Methodist Church, Boonville
- Mini & Self Storage, Boonville
- Miscellaneous Government, Boonville
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- Miscellaneous Industry, Boonville
- Miscellaneous Professional, Boonville
- Mortgage Bankers & Correspondents, Boonville
- Motor Vehicle, Boonville
- Motor Vehicle Rental & Leasing, Boonville
- Motorcycle Parts, Accessories & Dealers, Boonville
- Moving Truck Rental , Boonville
- Museums, Boonville
- Musical Instruments Repair, Sales & Service, Boonville
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