- Machine Shop, Magnolia
- Machine Shop & Tool Repair Service, Magnolia
- Machinery Repair & Rebuild, Magnolia
- Machinery, Supplies & Equipment - Business Production Related, Magnolia
- Machinery, Supplies & Equipment - Business Supplies Related, Magnolia
- Machinery, Supplies & Equipment - Construction & Contractor Related, Magnolia
- Mailbox Rental Services, Magnolia
- Mailing, Delivery & Courier Service, Magnolia
- Management Consultants & Services, Magnolia
- Manicurists & Pedicurists, Magnolia
- Manufacturers Agents & Representatives, Magnolia
- Manufacturers Representative, Magnolia - Reps, Independent Sales Representative, Sales Agent, etc
- Manufacturing, Magnolia
- Manufacturing Products, Magnolia
- Marriage & Family Counselors, Magnolia
- Martial Arts & Self Defense Schools, Magnolia
- Masonry Contractors, Magnolia - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Magnolia
- Massage Therapists & Professional, Magnolia
- Massage Therapy, Magnolia
- Massage Therapy Relaxation, Magnolia
- Mausoleums Developers, Magnolia
- Meat Market, Wholesale & Products, Magnolia
- Mechanical Contractors, Magnolia - Install, Service & Repair
- Medical & Health Service Organizations, Magnolia
- Medical Groups & Clinics, Magnolia - Medical & Health Centers
- Medical Research, Magnolia
- Medical Supplies & Equipment, Magnolia
- Men's & Boys Clothing & Accessories Stores, Magnolia
- Mens & Boys Jeans & Western Wear Stores, Magnolia
- Merchandise Sales Events, Magnolia
- Metal Buildings, Magnolia - Kits, Homes, Steel Buildings, etc
- Metal Products, Magnolia
- Metal Products, Magnolia
- Metal Repair Service & Blacksmith, Magnolia - Iron Works
- Metallurgical Testing Labs, Magnolia
- Methodist Church, Magnolia
- Mexican Restaurants, Magnolia
- Midwives, Magnolia
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- Millwork Contractors, Magnolia
- Mini & Self Storage, Magnolia
- Mining, Magnolia
- Ministries Church, Magnolia
- Mirrors, Magnolia - Custom, Framed, Bathroom, Vanity & Wall Mirrors
- Miscellaneous Business Credit Institutions & Services, Magnolia
- Miscellaneous Household Item Repair, Magnolia
- Miscellaneous Prosthesis & Appliances, Magnolia
- Miscellaneous Business Services, Magnolia
- Miscellaneous Government, Magnolia
- Miscellaneous Manufacturing, Magnolia
- Miscellaneous Personal Services, Magnolia
- Miscellaneous Photographers, Magnolia
- Miscellaneous Professional, Magnolia
- Mission Churches, Magnolia
- Monuments, Tombstones, Markers & Memorials, Magnolia
- Mortgage Bankers & Correspondents, Magnolia
- Mortgages & Loans, Magnolia
- Mosquito Control, Magnolia
- Motor Homes Renting & Leasing, Magnolia
- Motor Vehicle, Magnolia
- Motor Vehicle Rental & Leasing, Magnolia
- Motorcycle & Motor Scooters Dealers, Repair & Service, Magnolia
- Motorcycle Parts & Equipment, Magnolia
- Motorcycle Parts, Accessories & Dealers, Magnolia
- Motorcycle Performance Racing Equipment & Service, Magnolia
- Motorcycle Repair & Service, Magnolia
- Motorcycles Bicycles & Parts, Magnolia
- Moving & Storage Supplies & Equipment, Magnolia
- Moving Companies, Magnolia
- Moving Supplies & Equipment Rental, Magnolia
- Moving Truck Rental , Magnolia
- Muffler Shop & Exhaust Systems, Magnolia
- Music, Magnolia
- Music Lessons, Magnolia
- Music Lessons - Instrumental, Magnolia
- Musical Instrument Rental, Magnolia - Band & Orchestra Instruments
- Musical Instruments & Equipment Stores, Magnolia
- Musical Instruments Repair, Sales & Service, Magnolia
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