- Machine Shop & Tool Repair Service, Jefferson
- Machinery, Supplies & Equipment - Business Production Related, Jefferson
- Machinery, Supplies & Equipment - Business Supplies Related, Jefferson
- Machinery, Supplies & Equipment - Construction & Contractor Related, Jefferson
- Mailing, Delivery & Courier Service, Jefferson
- Major Appliances, Jefferson - Household & Kitchen
- Manicurists & Pedicurists, Jefferson
- Manufacturing, Jefferson
- Manufacturing Products, Jefferson
- Marine Products And Services, Jefferson
- Marine Repair & Service Stations, Jefferson
- Marine Services, Jefferson
- Marine Supplies & Equipment, Jefferson - Boat Supplies
- Marine Supplies & Equipment Repair, Jefferson - Boat Supplies & Equipment
- Marriage & Family Counselors, Jefferson
- Masonry Materials & Supplies, Jefferson
- Membership Sports & Recreation Clubs, Jefferson
- Mental Health Specialists, Jefferson - Psychologist, Psychiatrist, Psychotherapist, etc
- Metal Working Machinery, Jefferson
- Methodist Church, Jefferson
- Mexican Restaurants, Jefferson
- Millwork Contractors, Jefferson
- Mineral Wool Manufacturers, Jefferson
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- Mini & Self Storage, Jefferson
- Mining, Jefferson
- Ministries Church, Jefferson
- Mirrors, Jefferson - Custom, Framed, Bathroom, Vanity & Wall Mirrors
- Miscellaneous Business Services, Jefferson
- Miscellaneous Government, Jefferson
- Miscellaneous Personal Services, Jefferson
- Miscellaneous Professional, Jefferson
- Mission Churches, Jefferson
- Monuments, Tombstones, Markers & Memorials, Jefferson
- Mortgage Bankers & Correspondents, Jefferson
- Mortgages & Loans, Jefferson
- Motor Vehicle, Jefferson
- Motor Vehicle Rental & Leasing, Jefferson
- Motorcycle & ATV Repair & Service, Jefferson
- Motorcycle & Motor Scooters Dealers, Repair & Service, Jefferson
- Motorcycle Parts, Accessories & Dealers, Jefferson
- Motorcycle Repair & Service, Jefferson
- Moving Companies, Jefferson
- Moving Supplies & Equipment Rental, Jefferson
- Moving Truck Rental , Jefferson
- Museums, Jefferson
- Music Schools, Jefferson
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