- Machine Shop & Tool Repair Service, Newburgh
- Machine Tool Repair & Rebuild, Newburgh
- Machinery, Supplies & Equipment - Business Production Related, Newburgh
- Machinery, Supplies & Equipment - Business Supplies Related, Newburgh
- Machinery, Supplies & Equipment - Construction & Contractor Related, Newburgh
- Magazine & Newspaper Stands, Newburgh - Dealers & Distributors
- Magnetic Devices, Newburgh
- Magnets & Magnetic Devices, Newburgh
- Mail Delivery Service, Newburgh
- Mailbox Rental Services, Newburgh
- Mailing, Delivery & Courier Service, Newburgh
- Major Appliances, Newburgh - Household & Kitchen
- Malls & Shopping Centers, Newburgh
- Management Consultants & Services, Newburgh
- Manicurists & Pedicurists, Newburgh
- Manufacturing, Newburgh
- Manufacturing Products, Newburgh
- Maps & Supplies, Newburgh
- Marble Contractors, Newburgh - Installation, Cleaning & Removal Services
- Marinas & Marina Services, Newburgh
- Marine Lifts, Launching & Recovery, Newburgh
- Marine Products And Services, Newburgh
- Marine Services, Newburgh
- Marine Supplies & Equipment, Newburgh - Boat Supplies
- Marriage & Family Counselors, Newburgh
- Martial Arts & Self Defense Schools, Newburgh
- Masonry Contractors, Newburgh - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Newburgh
- Massage Therapists & Professional, Newburgh
- Massage Therapy, Newburgh
- Mastectomy Apparel, Forms, Prostheses & Supplies, Newburgh
- Material Handling & Heavy Machinery & Equipment, Newburgh
- Meat Market, Wholesale & Products, Newburgh
- Mechanical Contractors, Newburgh - Install, Service & Repair
- Medical Billing Services, Newburgh
- Medical Diagnostic Clinics, Newburgh - Clinical Labs & Centers
- Medical Equipment Manufacturers, Newburgh
- Medical Groups & Clinics, Newburgh - Medical & Health Centers
- Medical Supplies & Equipment, Newburgh
- Membership Sports & Recreation Clubs, Newburgh
- Mental Health Specialists, Newburgh - Psychologist, Psychiatrist, Psychotherapist, etc
- Merchandise Sales Events, Newburgh
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- Merchandising & Pricing Equipment, Newburgh
- Messenger Service, Newburgh - Message Receiving & Forwarding Service
- Metal Finishers, Newburgh
- Metal Plating & Polishing, Newburgh
- Metal Repair Service & Blacksmith, Newburgh - Iron Works
- Methodist Church, Newburgh
- Mexican Restaurants, Newburgh
- Middle Eastern Restaurants, Newburgh
- Millwork Contractors, Newburgh
- Mini & Self Storage, Newburgh
- Ministries Church, Newburgh
- Miscellaneous Business Product Repair, Newburgh
- Miscellaneous Business Services, Newburgh
- Miscellaneous Government, Newburgh
- Miscellaneous Industry, Newburgh
- Miscellaneous Manufacturing, Newburgh
- Miscellaneous Personal Services, Newburgh
- Miscellaneous Photographers, Newburgh
- Miscellaneous Professional, Newburgh
- Modeling & Talent Agencies, Newburgh
- Modular & Mobile Homes For Sale, Newburgh - Manufactured Homes Sale & Service
- Monuments, Tombstones, Markers & Memorials, Newburgh
- Mortgage Bankers & Correspondents, Newburgh
- Mortgage Companies, Newburgh
- Mortgages & Loans, Newburgh
- Motion Picture Pre & Post Production Services, Newburgh
- Motor Vehicle, Newburgh
- Motor Vehicle Rental & Leasing, Newburgh
- Motorcycle Parts, Accessories & Dealers, Newburgh
- Motorcycle Repair & Service, Newburgh
- Movie Theaters, Newburgh
- Moving & Storage Supplies & Equipment, Newburgh
- Moving Companies, Newburgh
- Moving Supplies & Equipment Rental, Newburgh
- Moving Truck Rental , Newburgh
- Muffler Shop & Exhaust Systems, Newburgh
- Museums, Newburgh
- Music, Newburgh
- Musical Instrument Manufacturers, Newburgh
- Musical Instruments & Equipment Stores, Newburgh
- Musical Instruments Supplies & Accessories Manufacturers, Newburgh
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