| Name | Phone | Category |
| MacDonald-Miller Facility Solutions | 971-244-0901 | Air Conditioning Contractors |
| Mack Drilling Company, Inc. | 503-371-4399 | Well Drilling & Service |
| Mackey Porth & Unrein | 503-370-9617 | Accounting & Tax Service |
| Madrona Hills ACE Hardware | 503-763-6323 | Home & Garden |
| Madrona Hills Retirement Center | 503-362-9141 | Retirement & Life Care Communities & Homes |
| Magoo's, Inc. | 503-363-5836 | Restaurants |
| MaPS Credit Union | 503-588-0181 | Credit Unions |
| MaPS Credit Union - South Salem Branch | 503-566-2135 | Credit Unions |
| MaPS Credit Union - West Salem Branch | 503-588-7115 | Credit Unions |
| Marc Nelson Oil Products, Inc. | 503-363-7676 | Oils - Fuel |
| March of Dimes | 503-222-9434 | Associations |
| Marian Estates | (503) 769-3499 | Retirement & Life Care Communities & Homes |
| Marion County | 503-588-5212 | Government Agencies |
| Marion County Department of Public Works | 503-588-5036 | Government Agencies |
| Marion County Dept of Children and Families | 503-588-7975 | Government Agencies |
| Marion County Health Department | 503-588-5357 | Government Agencies |
| Marion County Historical Society | 503-364-2128 | Museums |
| Marion County Republican Party | 503-364-0747 | Political |
| Marion-Polk County Medical Society | 503-362-9669 | Associations |
| Marion-Polk Food Share, Inc. | 503-581-3855 | Social Service Organizations |
| Marion/Clackamas Oregon Women for AG | (503) 749-2168 | Associations |
| Mark Rogers, D.M.D. | 503-362-1515 | Dentists |
| Marquis At Home | 503-363-4733 | Home Health Services |
| Martin Bros. Inc. | 503-364-2211 | Signs - Electric & Neon |
| Elaine Martinez | 503-991-5888 | Individuals |
| Marti's Interiors | 503-585-1639 | Furniture - Retail |
| Mary Lou Zeek Gallery | 503-581-3229 | Art Galleries, Dealers & Consultants |
| Matt's Entertainment | 541-497-6020 | Entertainment & Amusement Places |
| Mayor, City of Salem | 503-588-6159 | Political |
| McDonald's Restaurant | 503-581-3683 | Restaurants |
| McGrath's Fish House | 503-362-0736 | Restaurants |
| McMenamins Hotel Oregon | 503-472-8427 | Hotels & Other Accommodations |
| McNall Construction | 503-581-0551 | Contractors - General |
| Meadow Creek Village | 503-375-9732 | Retirement & Life Care Communities & Homes |
| Meadowlawn Apartments | 503-362-3463 | Property Management |
| Media Guard | 503-881-1282 | Advertising Agencies |
| Melhorn & Associates PC | 503-391-1814 | Accounting & Tax Service |
| Mel's Stoves | 503-378-0162 | Heating Contractors |
| Melton's Fireplace & Patio Store, LLC | 503-485-4777 | Kitchens - Outdoor |
| Melton's Heating & Air Conditioning, Inc. | 503-378-7482 | Heating Contractors |
| Meringue A Boutique | 503-365-7725 | Clothes - Women - Retail |
| Merrill Lynch | 503-362-9556 | Investment Securities |
| Merrill Lynch, Benny Won | 503-362-9556 | Investment Securities |
| Mid-Valley Garbage & Recycling Association | (503) 390-4000 | Recycling Services |
| Mid-Valley Independent Physician's Association | 503-371-7701 | Associations |
| Mid-Valley Placement & Staffing, Inc. | 503-362-5705 | Employment Contractors - Temporary Help |
| Mid-Valley Presort & Mailing | 503-378-7319 | Mailing Services |
| Mid-Valley Video Festival | 503-364-1403 | Associations |
| Mid-Valley Women's Crisis Service | 503-378-1572 | Social Service Organizations |
| Mid-Willamette Education Consortium | 503-399-2339 | Government Agencies |
| C.E. Miller Co., Inc. | 503-363-9271 | Auto Body Repair & Paint |
| Miss Marion-Polk Scholarship Program | 503-580-0822 | Associations |
| Mission Medical Imaging | 503-362-0254 | Physicians & Surgeons - Radiology |
| Mission Mill Cafe | 503-763-1266 | Restaurants |
| Mission Mill Museum Association | 503-585-7012 | Museums |
| Mitchell's Mobile Lube | 503-588-5555 | Auto Oil & Lube |
| Modern Building Systems, Inc. | 503-749-4949 | Mobile Offices & Commercial Units |
| Mona Vie - Kerry Thompson, Independent Distributor | 503-551-9148 | Health, Fitness & Nutrition Consultants |
| Monarch Medical Weight Loss Center | 503-485-2100 | Clinics - Medical |
| Moore, Larry | 503-364-9730 | Individuals |
| Raquel C. Moore-Green | 503-362-5021 | Individuals |
| Morgan Stanley Smith Barney | 503-588-5726 | Financial Planning Consultants |
| Morgan Stanley Smith Barney, Barbara Hacke Resch | 503-588-5738 | Financial Planning Consultants |
| Morgan Stanley Smith Barney, Sara Wallace | 503-588-5718 | Financial Planning Consultants |
| Morrow Equipment Company, LLC | 503-585-5721 | Contractor Equipment & Supplies |
| Mountain Man Nut & Fruit Co. | 503-393-3136 | Food Products |
| Mountain West Investment Corp | 503-581-4654 | Real Estate Developers |
| Multi/Tech Engineering Services, Inc. | 503-363-9227 | Engineers - Consulting |
| MV Weyden Construction Company, LLC | 503-585-1761 | Contractors - General |
| MVP Majestic Video & Photo | 503-375-4756 | Video Production Services |
| Mz Jitterbug | 971-239-5340 | Dance Studio/Instruction |