- Machine Shop, Lexington
- Machine Shop & Tool Repair Service, Lexington
- Machinery, Supplies & Equipment - Business Production Related, Lexington
- Machinery, Supplies & Equipment - Business Supplies Related, Lexington
- Machinery, Supplies & Equipment - Construction & Contractor Related, Lexington
- Magazine & Newspaper Stands, Lexington - Dealers & Distributors
- Mailbox Rental Services, Lexington
- Mailing, Delivery & Courier Service, Lexington
- Maintenance, Cleaning & Sanitation, Lexington
- Major Appliances, Lexington - Household & Kitchen
- Management Consultants & Services, Lexington
- Manicurists & Pedicurists, Lexington
- Manufacturing, Lexington
- Marriage & Family Counselors, Lexington
- Martial Arts & Self Defense Schools, Lexington
- Masonry Materials & Supplies, Lexington
- Massage Therapy, Lexington
- Meat Market, Wholesale & Products, Lexington
- Medical Diagnostic Clinics, Lexington - Clinical Labs & Centers
- Medical Equipment, Supplies, Devices & Instruments - Repair & Service, Lexington
- Medical Groups & Clinics, Lexington - Medical & Health Centers
- Medical Supplies & Equipment, Lexington
- Men's Clothing Stores, Lexington - Clothes & Accessories
- Mental Health Specialists, Lexington - Psychologist, Psychiatrist, Psychotherapist, etc
- Merchandise Sales Events, Lexington
- Metal Repair Service & Blacksmith, Lexington - Iron Works
- Methodist Church, Lexington
- Mexican Restaurants, Lexington
- Mildew Removal & Control, Lexington - Mold Removal
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- Mining, Lexington
- Mining Development & Exploration, Lexington
- Mining Services, Lexington
- Miscellaneous Business Services, Lexington
- Miscellaneous Government, Lexington
- Miscellaneous Personal Services, Lexington
- Miscellaneous Photographers, Lexington
- Miscellaneous Professional, Lexington
- Money Transfer Service, Lexington
- Monuments, Tombstones, Markers & Memorials, Lexington
- Mortgage Bankers & Correspondents, Lexington
- Mortgages & Loans, Lexington
- Motor Vehicle, Lexington
- Motor Vehicle Rental & Leasing, Lexington
- Motorcycle & Motor Scooters Dealers, Repair & Service, Lexington
- Motorcycle Repair & Service, Lexington
- Movie Theaters, Lexington
- Moving & Storage Supplies & Equipment, Lexington
- Moving Companies, Lexington
- Moving Services - Labor & Material, Lexington
- Moving Supplies & Equipment Rental, Lexington
- Moving Truck Rental , Lexington
- Muffler Shop & Exhaust Systems, Lexington
- Mulch, Peat & Moss Products, Lexington
- Museums, Lexington
- Music, Lexington
- Musical Instrument Rental, Lexington - Band & Orchestra Instruments
- Musical Instruments & Equipment Stores, Lexington
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