- Machine Shop & Tool Repair Service, Humboldt
- Machinery, Supplies & Equipment - Business Production Related, Humboldt
- Machinery, Supplies & Equipment - Business Supplies Related, Humboldt
- Mail Delivery Service, Humboldt
- Major Appliances, Humboldt - Household & Kitchen
- Management Consultants & Services, Humboldt
- Manicurists & Pedicurists, Humboldt
- Manufacturing, Humboldt
- Manufacturing Equipment & Supplies, Humboldt
- Manufacturing Products, Humboldt
- Marriage & Family Counselors, Humboldt
- Masonry Contractors, Humboldt - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Humboldt
- Mechanical Engineer, Humboldt - Mechanical Engineering Service
- Membership Sports & Recreation Clubs, Humboldt
- Merle Norman Cosmetics, Humboldt
- Metal Repair Service & Blacksmith, Humboldt - Iron Works
- Methodist Church, Humboldt
- Mexican Restaurants, Humboldt
- Michelin Tires, Humboldt - Dealers
- Miscellaneous Business Credit Institutions & Services, Humboldt
|
- Miscellaneous Agriculture, Humboldt
- Miscellaneous Business Services, Humboldt
- Miscellaneous Commercial & Industrial Supplies & Equipment Rental & Leasing, Humboldt
- Miscellaneous Government, Humboldt
- Miscellaneous Personal Services, Humboldt
- Miscellaneous Photographers, Humboldt
- Miscellaneous Professional, Humboldt
- Mission Churches, Humboldt
- Mobile Home Parks & Communities , Humboldt
- Modular & Mobile Homes For Sale, Humboldt - Manufactured Homes Sale & Service
- Monuments, Tombstones, Markers & Memorials, Humboldt
- Mortgage Bankers & Correspondents, Humboldt
- Motor Vehicle, Humboldt
- Motor Vehicle Rental & Leasing, Humboldt
- Moving Companies, Humboldt
- Moving Truck Rental , Humboldt
- Muffler Shop & Exhaust Systems, Humboldt
- Museums, Humboldt
- Music, Humboldt
- Musical Instrument Rental, Humboldt - Band & Orchestra Instruments
- Musical Instruments & Equipment Stores, Humboldt
|