- Machine Shop & Tool Repair Service, Leesburg
- Machinery, Supplies & Equipment - Business Production Related, Leesburg
- Machinery, Supplies & Equipment - Business Supplies Related, Leesburg
- Machinery, Supplies & Equipment - Construction & Contractor Related, Leesburg
- Mailing, Delivery & Courier Service, Leesburg
- Major Appliances, Leesburg - Household & Kitchen
- Management Consultants & Services, Leesburg
- Manicurists & Pedicurists, Leesburg
- Manifold Business Forms Manufacturers, Leesburg
- Manufacturing, Leesburg
- Manufacturing Products, Leesburg
- Masonry Contractors, Leesburg - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Leesburg
- Massage Therapy, Leesburg
- Meat Market, Wholesale & Products, Leesburg
- Metal Tanks, Leesburg
- Methodist Church, Leesburg
- Mexican Restaurants, Leesburg
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- Mini & Self Storage, Leesburg
- Ministries Church, Leesburg
- Miscellaneous Government, Leesburg
- Miscellaneous Industry, Leesburg
- Miscellaneous Personal Services, Leesburg
- Miscellaneous Professional, Leesburg
- Mobile Home Parks & Communities , Leesburg
- Modular & Mobile Homes For Sale, Leesburg - Manufactured Homes Sale & Service
- Monuments, Tombstones, Markers & Memorials, Leesburg
- Mortgage Bankers & Correspondents, Leesburg
- Mortgage Companies, Leesburg
- Motor Vehicle, Leesburg
- Motor Vehicle Rental & Leasing, Leesburg
- Motorcycle & Motor Scooters Dealers, Repair & Service, Leesburg
- Motorcycle Repair & Service, Leesburg
- Moving Companies, Leesburg
- Moving Truck Rental , Leesburg
- Musical Instruments Repair, Sales & Service, Leesburg
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