- Machinery, Supplies & Equipment - Business Supplies Related, Heathsville
- Management Consultants & Services, Heathsville
- Manufacturing, Heathsville
- Marinas & Marina Services, Heathsville
- Marine Contractors & Designers, Heathsville
- Masonry Contractors, Heathsville - Stone Mason, Brick Mason - Install & Repair
- Meat Market, Wholesale & Products, Heathsville
- Mechanical Contractors, Heathsville - Install, Service & Repair
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- Methodist Church, Heathsville
- Miscellaneous Agriculture, Heathsville
- Miscellaneous Government, Heathsville
- Miscellaneous Personal Services, Heathsville
- Miscellaneous Professional, Heathsville
- Monuments, Tombstones, Markers & Memorials, Heathsville
- Motor Vehicle, Heathsville
- Museums, Heathsville
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