- Machine Shop, Ponchatoula
- Machine Shop & Tool Repair Service, Ponchatoula
- Machinery, Supplies & Equipment - Business Production Related, Ponchatoula
- Machinery, Supplies & Equipment - Construction & Contractor Related, Ponchatoula
- Management Consultants & Services, Ponchatoula
- Manicurists & Pedicurists, Ponchatoula
- Manufacturing, Ponchatoula
- Marinas & Marina Services, Ponchatoula
- Marine Supplies & Equipment, Ponchatoula - Boat Supplies
- Martial Arts & Self Defense Schools, Ponchatoula
- Massage Parlor & Steam Bath Services, Ponchatoula
- Massage Therapy, Ponchatoula
- Membership Sports & Recreation Clubs, Ponchatoula
- Merchandise Sales Events, Ponchatoula
- Metal Coating & Allied Services, Ponchatoula
- Metal Repair Service & Blacksmith, Ponchatoula - Iron Works
- Methodist Church, Ponchatoula
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- Mexican Restaurants, Ponchatoula
- Ministries Church, Ponchatoula
- Mirrors, Ponchatoula - Custom, Framed, Bathroom, Vanity & Wall Mirrors
- Miscellaneous Government, Ponchatoula
- Miscellaneous Industry, Ponchatoula
- Miscellaneous Personal Services, Ponchatoula
- Miscellaneous Photographers, Ponchatoula
- Miscellaneous Professional, Ponchatoula
- Modular & Mobile Homes For Sale, Ponchatoula - Manufactured Homes Sale & Service
- Money Transfer Service, Ponchatoula
- Mortgage Bankers & Correspondents, Ponchatoula
- Mortgage Companies, Ponchatoula
- Motion Picture & Television Production Services, Ponchatoula
- Motor Vehicle, Ponchatoula
- Motor Vehicle Rental & Leasing, Ponchatoula
- Moving Truck Rental , Ponchatoula
- Muffler Shop & Exhaust Systems, Ponchatoula
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