- Machine Shop & Tool Repair Service, Williamsburg
- Machine Tools , Williamsburg
- Machinery, Supplies & Equipment - Business Production Related, Williamsburg
- Machinery, Supplies & Equipment - Business Supplies Related, Williamsburg
- Machinery, Supplies & Equipment - Construction & Contractor Related, Williamsburg
- Major Appliances, Williamsburg - Household & Kitchen
- Malls & Shopping Centers, Williamsburg
- Manicurists & Pedicurists, Williamsburg
- Manufacturing, Williamsburg
- Manufacturing & Industrial Consultants, Williamsburg
- Massage Therapists & Professional, Williamsburg
- Massage Therapy, Williamsburg
- Meat Market, Wholesale & Products, Williamsburg
- Meat Packers, Williamsburg
- Medical Supplies & Equipment, Williamsburg
- Mental Health Clinics, Williamsburg - Treatment Centers
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- Mental Health Specialists, Williamsburg - Psychologist, Psychiatrist, Psychotherapist, etc
- Merchandise Sales Events, Williamsburg
- Methodist Church, Williamsburg
- Mining, Williamsburg
- Mining Services, Williamsburg
- Ministries Church, Williamsburg
- Miscellaneous Government, Williamsburg
- Miscellaneous Manufacturing, Williamsburg
- Mission Churches, Williamsburg
- Modular & Mobile Homes For Sale, Williamsburg - Manufactured Homes Sale & Service
- Monuments, Tombstones, Markers & Memorials, Williamsburg
- Motor Vehicle, Williamsburg
- Motor Vehicle Rental & Leasing, Williamsburg
- Movie Theaters, Williamsburg
- Moving Truck Rental , Williamsburg
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