- Machine Shop & Tool Repair Service, Uhrichsville
- Machine Tool Repair & Rebuild, Uhrichsville
- Machinery, Supplies & Equipment - Construction & Contractor Related, Uhrichsville
- Manufacturing, Uhrichsville
- Manufacturing Products, Uhrichsville
- Marine Supplies & Equipment, Uhrichsville - Boat Supplies
- Masonry Materials & Supplies, Uhrichsville
- Membership Sports & Recreation Clubs, Uhrichsville
- Mental Retardation & Developmentally Disabled Services, Uhrichsville
- Metal Repair Service & Blacksmith, Uhrichsville - Iron Works
- Methodist Church, Uhrichsville
- Mexican Restaurants, Uhrichsville
- Mining, Uhrichsville
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- Mining Contractors, Uhrichsville - Mining Companies, Contractors & Brokers
- Mining Services, Uhrichsville
- Mining, Crude-Oil Production, Uhrichsville - Mining Companies
- Miscellaneous Manufacturing, Uhrichsville
- Miscellaneous Professional, Uhrichsville
- Moldings Materials, Uhrichsville
- Money Counting & Wrapping, Uhrichsville
- Mortgage Bankers & Correspondents, Uhrichsville
- Motor Vehicle, Uhrichsville
- Motor Vehicle Rental & Leasing, Uhrichsville
- Motorcycle Parts, Accessories & Dealers, Uhrichsville
- Moving Truck Rental , Uhrichsville
- Museums, Uhrichsville
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