- Machine Shop, Gardnerville
- Machine Shop & Tool Repair Service, Gardnerville
- Machinery, Supplies & Equipment - Business Production Related, Gardnerville
- Machinery, Supplies & Equipment - Business Supplies Related, Gardnerville
- Machinery, Supplies & Equipment - Construction & Contractor Related, Gardnerville
- Mail Delivery Service, Gardnerville
- Mail Receiving & Forwarding Service, Gardnerville
- Mailbox Rental Services, Gardnerville
- Mailing, Delivery & Courier Service, Gardnerville
- Maintenance, Cleaning & Sanitation, Gardnerville
- Major Appliance Repair & Service, Gardnerville
- Major Appliances, Gardnerville - Household & Kitchen
- Make Up & Cosmetics Application, Gardnerville
- Management Consultants & Services, Gardnerville
- Manicurists & Pedicurists, Gardnerville
- Manufacturing, Gardnerville
- Manufacturing Products, Gardnerville
- Marinas & Marina Services, Gardnerville
- Marriage & Family Counselors, Gardnerville
- Martial Arts & Self Defense Schools, Gardnerville
- Masonry Contractors, Gardnerville - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Gardnerville
- Massage Therapists & Professional, Gardnerville
- Massage Therapy, Gardnerville
- Mechanical Engineer, Gardnerville - Mechanical Engineering Service
- Medical Billing Services, Gardnerville
- Medical Examiner, Gardnerville - Doctors, Physicians & Surgeons
- Medical Supplies & Equipment, Gardnerville
- Men's & Boys Clothing & Accessories Stores, Gardnerville
- Mens & Boys Jeans & Western Wear Stores, Gardnerville
- Mental Health Clinics, Gardnerville - Treatment Centers
- Mental Health Specialists, Gardnerville - Psychologist, Psychiatrist, Psychotherapist, etc
- Merchandise Sales Events, Gardnerville
- Metal Buildings, Gardnerville - Kits, Homes, Steel Buildings, etc
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- Metal Repair Service & Blacksmith, Gardnerville - Iron Works
- Methodist Church, Gardnerville
- Mexican Restaurants, Gardnerville
- Mildew Removal & Control, Gardnerville - Mold Removal
- Mini & Self Storage, Gardnerville
- Mining Consultants, Gardnerville
- Miscellaneous Business Services, Gardnerville
- Miscellaneous Government, Gardnerville
- Miscellaneous Industry, Gardnerville
- Miscellaneous Manufacturing, Gardnerville
- Miscellaneous Personal Services, Gardnerville
- Miscellaneous Professional, Gardnerville
- Mobile Home Parks & Communities , Gardnerville
- Modular & Mobile Homes For Sale, Gardnerville - Manufactured Homes Sale & Service
- Monuments, Tombstones, Markers & Memorials, Gardnerville
- Mortgage Bankers & Correspondents, Gardnerville
- Mortgage Brokers, Gardnerville
- Mortgage Companies, Gardnerville
- Mortgage Contracts & Services, Gardnerville
- Mortgage Feasibility Consultants, Gardnerville
- Mortgages & Loans, Gardnerville
- Motion Picture Pre & Post Production Services, Gardnerville
- Motor Vehicle, Gardnerville
- Motor Vehicle Rental & Leasing, Gardnerville
- Motorcycle & ATV Repair & Service, Gardnerville
- Motorcycle & Motor Scooters Dealers, Repair & Service, Gardnerville
- Motorcycle Parts, Accessories & Dealers, Gardnerville
- Motorcycle Repair & Service, Gardnerville
- Moving & Storage Supplies & Equipment, Gardnerville
- Moving Companies, Gardnerville
- Moving Truck Rental , Gardnerville
- Muffler Shop & Exhaust Systems, Gardnerville
- Murals & Faux Finish Walls, Gardnerville
- Museums, Gardnerville
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