- Magazine & Newspaper Stands, Lewiston - Dealers & Distributors
- Mailbox Rental Services, Lewiston
- Mailing, Delivery & Courier Service, Lewiston
- Management Consultants & Services, Lewiston
- Manicurists & Pedicurists, Lewiston
- Manufacturing, Lewiston
- Manufacturing Products, Lewiston
- Marriage & Family Counselors, Lewiston
- Martial Arts & Self Defense Schools, Lewiston
- Massage Therapists & Professional, Lewiston
- Massage Therapy, Lewiston
- Meat Market, Wholesale & Products, Lewiston
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- Medical Alert Systems, Lewiston - Medical Alarms - PERS
- Medical Groups & Clinics, Lewiston - Medical & Health Centers
- Medical Supplies & Equipment, Lewiston
- Metal Repair Service & Blacksmith, Lewiston - Iron Works
- Miscellaneous Business Product Repair, Lewiston
- Miscellaneous Photographers, Lewiston
- Moisture & Vapor Control, Lewiston
- Motor Vehicle, Lewiston
- Moving & Storage Supplies & Equipment, Lewiston
- Museums, Lewiston
- Music, Lewiston
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