- Machine Shop & Tool Repair Service, Sanford
- Machinery And Equipment Manufacturers, Sanford
- Machinery Custom Design Manufacturers, Sanford
- Manicurists & Pedicurists, Sanford
- Manufacturing, Sanford
- Marinas & Marina Services, Sanford
- Masonry Materials & Supplies, Sanford
- Measuring Instruments, Sanford - Measuring Machines & Equipment
- Metal Detecting Equipment, Sanford
- Methodist Church, Sanford
- Mexican Restaurants, Sanford
- Mining, Sanford
- Ministries Church, Sanford
- Miscellaneous Government, Sanford
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- Mobile Home Contractors, Sanford
- Mobile Home Improvements & Repairs, Sanford
- Mobile Home Parks & Communities , Sanford
- Modular & Mobile Homes For Sale, Sanford - Manufactured Homes Sale & Service
- Motor Vehicle, Sanford
- Motor Vehicle Rental & Leasing, Sanford
- Motorcycle & ATV Repair & Service, Sanford
- Motorcycle & Motor Scooters Dealers, Repair & Service, Sanford
- Motorcycle Repair & Service, Sanford
- Moving Truck Rental , Sanford
- Muffler Shop & Exhaust Systems, Sanford
- Museums, Sanford
- Music, Sanford
- Musical Instruments & Equipment Stores, Sanford
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