- Manufacturing, Madison
- Masonry Materials & Supplies, Madison
- Massage Therapists & Professional, Madison
- Massage Therapy, Madison
- Mental Health Specialists, Madison - Psychologist, Psychiatrist, Psychotherapist, etc
- Methodist Church, Madison
- Mexican Restaurants, Madison
- Miscellaneous Government, Madison
- Miscellaneous Personal Services, Madison
- Miscellaneous Photographers, Madison
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- Miscellaneous Professional, Madison
- Mission Churches, Madison
- Motion Picture Pre & Post Production Services, Madison
- Motor Vehicle, Madison
- Motorcycle & Motor Scooters Dealers, Repair & Service, Madison
- Motorcycle Parts, Accessories & Dealers, Madison
- Motorcycle Repair & Service, Madison
- Moving & Storage Supplies & Equipment, Madison
- Museums, Madison
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