- Machine Shop & Tool Repair Service, Jefferson
- Machinery, Supplies & Equipment - Business Supplies Related, Jefferson
- Machinery, Supplies & Equipment - Construction & Contractor Related, Jefferson
- Major Appliances, Jefferson - Household & Kitchen
- Manufacturing, Jefferson
- Marinas & Marina Services, Jefferson
- Marine Salvage & Wrecking Services, Jefferson
- Methodist Church, Jefferson
- Mexican Restaurants, Jefferson
- Mini & Self Storage, Jefferson
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- Mining, Jefferson
- Miscellaneous Business Services, Jefferson
- Miscellaneous Government, Jefferson
- Miscellaneous Photographers, Jefferson
- Monuments, Tombstones, Markers & Memorials, Jefferson
- Mortgage Bankers & Correspondents, Jefferson
- Motor Vehicle, Jefferson
- Motor Vehicle Rental & Leasing, Jefferson
- Moving Truck Rental , Jefferson
- Museums, Jefferson
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