- Machinery And Equipment Manufacturers, Jefferson
- Machinery, Supplies & Equipment - Business Supplies Related, Jefferson
- Machinery, Supplies & Equipment - Construction & Contractor Related, Jefferson
- Magazine & Newspaper Stands, Jefferson - Dealers & Distributors
- Manufacturing, Jefferson
- Manufacturing Products, Jefferson
- Marriage & Family Counselors, Jefferson
- Masonry Contractors, Jefferson - Stone Mason, Brick Mason - Install & Repair
- Massage Therapists & Professional, Jefferson
- Massage Therapy, Jefferson
- Medical Supplies & Equipment, Jefferson
- Membership Sports & Recreation Clubs, Jefferson
- Mental Health Specialists, Jefferson - Psychologist, Psychiatrist, Psychotherapist, etc
- Metal Roofs, Jefferson
- Methodist Church, Jefferson
- Mini & Self Storage, Jefferson
- Mining, Jefferson
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- Miscellaneous Government, Jefferson
- Miscellaneous Manufacturing, Jefferson
- Miscellaneous Professional, Jefferson
- Mobile Home Parks & Communities , Jefferson
- Mobile Home Site Preparation, Jefferson
- Modular & Mobile Homes For Sale, Jefferson - Manufactured Homes Sale & Service
- Moldings Materials, Jefferson
- Molds, Jefferson
- Monuments, Tombstones, Markers & Memorials, Jefferson
- Motor Vehicle, Jefferson
- Motor Vehicle Rental & Leasing, Jefferson
- Motorcycle & ATV Repair & Service, Jefferson
- Motorcycle Parts, Accessories & Dealers, Jefferson
- Motorcycle Repair & Service, Jefferson
- Moving Truck Rental , Jefferson
- Muffler Shop & Exhaust Systems, Jefferson
- Museums, Jefferson
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