- Machinery, Supplies & Equipment - Business Supplies Related, Donaldsonville
- Machinery, Supplies & Equipment - Construction & Contractor Related, Donaldsonville
- Major Appliances, Donaldsonville - Household & Kitchen
- Management Consultants & Services, Donaldsonville
- Manicurists & Pedicurists, Donaldsonville
- Manufacturing, Donaldsonville
- Marine Surveyors & Adjustors, Donaldsonville
- Marriage & Family Counselors, Donaldsonville
- Masonry Materials & Supplies, Donaldsonville
- Mass Transit Vehicle Dealers, Donaldsonville
- Meat Market, Wholesale & Products, Donaldsonville
- Men's Clothing Stores, Donaldsonville - Clothes & Accessories
- Mental Health Clinics, Donaldsonville - Treatment Centers
- Merle Norman Cosmetics, Donaldsonville
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- Methodist Church, Donaldsonville
- Mexican Restaurants, Donaldsonville
- Mining, Donaldsonville
- Miscellaneous Agriculture, Donaldsonville
- Miscellaneous Government, Donaldsonville
- Miscellaneous Professional, Donaldsonville
- Modular & Mobile Homes For Sale, Donaldsonville - Manufactured Homes Sale & Service
- Monuments, Tombstones, Markers & Memorials, Donaldsonville
- Mortgage Bankers & Correspondents, Donaldsonville
- Motor Vehicle, Donaldsonville
- Motor Vehicle Rental & Leasing, Donaldsonville
- Moving Companies, Donaldsonville
- Moving Truck Rental , Donaldsonville
- Museums, Donaldsonville
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