- Manicurists & Pedicurists, Avalon
- Manufacturing, Avalon
- Marinas & Marina Services, Avalon
- Marine Contractors & Designers, Avalon
- Marine Electronic Equipment, Avalon
- Marine Lifts, Launching & Recovery, Avalon
- Marine Pilot & Operator Service, Avalon
- Marine Products And Services, Avalon
- Marine Services, Avalon
- Marine Supplies & Equipment, Avalon - Boat Supplies
- Massage Therapists & Professional, Avalon
- Massage Therapy, Avalon
- Membership Sports & Recreation Clubs, Avalon
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- Men's Clothing Stores, Avalon - Clothes & Accessories
- Methodist Church, Avalon
- Mexican Restaurants, Avalon
- Mini Golf Courses, Avalon
- Miscellaneous Household Item Repair, Avalon
- Miscellaneous Government, Avalon
- Miscellaneous Manufacturing, Avalon
- Miscellaneous Personal Services, Avalon
- Miscellaneous Professional, Avalon
- Mobile Home Site Preparation, Avalon
- Motor Vehicle, Avalon
- Museums, Avalon
- Musical Instruments Repair, Sales & Service, Avalon
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