- Machine Shop, Porterville
- Machine Shop & Tool Repair Service, Porterville
- Machinery, Supplies & Equipment - Business Production Related, Porterville
- Machinery, Supplies & Equipment - Business Supplies Related, Porterville
- Machinery, Supplies & Equipment - Construction & Contractor Related, Porterville
- Mailbox Rental Services, Porterville
- Mailing, Delivery & Courier Service, Porterville
- Maintenance, Cleaning & Sanitation, Porterville
- Major Appliances, Porterville - Household & Kitchen
- Management Consultants & Services, Porterville
- Manicurists & Pedicurists, Porterville
- Manufactured & Mobile Home Movers & Transporting, Porterville
- Manufacturers Agents & Representatives, Porterville
- Manufacturers Representative, Porterville - Reps, Independent Sales Representative, Sales Agent, etc
- Manufacturing, Porterville
- Manufacturing Products, Porterville
- Martial Arts & Self Defense Schools, Porterville
- Masonry Materials & Supplies, Porterville
- Massage Therapists & Professional, Porterville
- Massage Therapy, Porterville
- Material Handling & Heavy Machinery & Equipment, Porterville
- Mattresses Renovating, Porterville
- Meat Market, Wholesale & Products, Porterville
- Medical & Dental Management, Porterville
- Medical Billing Consultants, Porterville
- Medical Business Management Services, Porterville
- Medical Diagnostic Imaging, Porterville
- Medical Groups & Clinics, Porterville - Medical & Health Centers
- Medical Management & Business Administration Service, Porterville
- Medical Supplies & Equipment, Porterville
- Membership Sports & Recreation Clubs, Porterville
- Men's & Boys Clothing & Accessories Stores, Porterville
- Men's Clothing Stores, Porterville - Clothes & Accessories
- Mens & Boys Jeans & Western Wear Stores, Porterville
- Mental Health Clinics, Porterville - Treatment Centers
- Mental Health Specialists, Porterville - Psychologist, Psychiatrist, Psychotherapist, etc
- Metal Buildings, Porterville - Kits, Homes, Steel Buildings, etc
- Metal Repair Service & Blacksmith, Porterville - Iron Works
- Metal Spinning Manufacturers, Porterville
- Methodist Church, Porterville
- Mexican Food, Porterville
- Mexican Restaurants, Porterville
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- Microwave Ovens, Porterville
- Midwives, Porterville
- Mildew Removal & Control, Porterville - Mold Removal
- Mini & Self Storage, Porterville
- Mining, Porterville
- Miscellaneous Household Item Repair, Porterville
- Miscellaneous Business Services, Porterville
- Miscellaneous Commercial & Industrial Supplies & Equipment Rental & Leasing, Porterville
- Miscellaneous Government, Porterville
- Miscellaneous Manufacturing, Porterville
- Miscellaneous Metal Work Manufacturers, Porterville
- Miscellaneous Personal Services, Porterville
- Miscellaneous Photographers, Porterville
- Miscellaneous Professional, Porterville
- Mobile Home Parks & Communities , Porterville
- Mobile Homes Manufactures, Porterville
- Modular & Mobile Homes For Sale, Porterville - Manufactured Homes Sale & Service
- Money Transfer Service, Porterville
- Monuments, Tombstones, Markers & Memorials, Porterville
- Mortgage Bankers & Correspondents, Porterville
- Mortgage Companies, Porterville
- Mortgage Loan Processors, Porterville
- Mortgages & Loans, Porterville
- Motion Picture & Television Production Services, Porterville
- Motion Picture Pre & Post Production Services, Porterville
- Motivational Speakers & Consultants, Porterville - Speakers, Lectures & Seminars
- Motor Vehicle, Porterville
- Motor Vehicle Rental & Leasing, Porterville
- Motorcycle & Motor Scooters Dealers, Repair & Service, Porterville
- Motorcycle Parts, Accessories & Dealers, Porterville
- Motorcycle Repair & Service, Porterville
- Movie Theaters, Porterville
- Moving & Storage Supplies & Equipment, Porterville
- Moving Companies, Porterville
- Moving Supplies & Equipment Rental, Porterville
- Moving Truck Rental , Porterville
- Muffler Shop & Exhaust Systems, Porterville
- Museums, Porterville
- Music, Porterville
- Musical Instruments & Equipment Stores, Porterville
- Musical Instruments Repair, Sales & Service, Porterville
- Musical Recording Services, Porterville
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