| Name | Phone | Category |
| K & E Excavating Inc. | 503-399-4833 | Excavation |
| K/P Corporation | 503-364-0175 | Printers |
| Kadel's Auto Body | 503-378-1159 | Auto Body Repair & Paint |
| Kaiser Permanente | 503-361-5400 | Insurance |
| KATU/Univision | 503-551-5177 Advertising | Advertising - Television |
| Kaufman Homes | 503-370-8390 | Contractors - General |
| KBZY 1490 AM Radio | 503-362-1490 | Radio Stations & Broadcast Companies |
| KC Printing | 503-378-9093 | Printers |
| Keizer Automotive & Towing | 503-390-2850 | Auto Repair & Service |
| Keizer Collision Center Inc. | 503-393-7361 | Auto Repair & Service |
| Keizer Iris Festival | 503-393-9111 | Events & Festivals |
| Keizer Nursery | (503) 393-8111/362-1687 | Nurseries - Plants, Trees, Etc. - Retail |
| Keizer Renaissance Inn | 503-390-4733 | Hotels & Other Accommodations |
| Keizer Station | (503) 588-7099 | Real Estate Developers |
| Keizer Sub Shop | (503) 393-0175 | Restaurants |
| Kelly Services | 503-371-3367 | Employment Agencies |
| Kelly's Home Center | 503-378-1793 | Appliances - Major - New |
| Kerr Concentrates, Inc. | 503-378-0493 | Food Products |
| Kettle Foods | 503-364-0399 | Food Products |
| Kevin L. Mannix P.C. | 503-364-1913 | Attorneys |
| kevmarc | 503-390-1743 | Advertising - Promotional Products |
| Key Ring Janitorial | 503-391-7833 | Janitor Service |
| KeyBank National Association | 503-399-2211 | Banks |
| KeyBank National Association | 503-399-2724 | Banks |
| KeyBank National Association - Lancaster | 503-399-2214 | Banks |
| KeyBank National Association - West Salem | 503-399-2291 | Banks |
| Kilgore-Blackman Building Materials | (503) 581-1611 | Building Materials - Retail |
| Douglas E. Knights, CPA, PC | 503-364-1061 | Accounting & Tax Service |
| KOA Salem, Inc. | (503) 581-6736 | Campgrounds |
| Kraft Custom Construction, Inc. | 503-364-5842 | Contractors - Remodel & Repair |
| Kraft Masonry, Inc. | 503-364-3103 | Contractors - Specialty |
| K-tec | 503-589-4311 | Environmental & Ecological Services |
| Kuenzi & Company LLC | 503-399-7306 | Accounting & Tax Service |
| KWBY 940 - La Pantera | 503-981-9400 | Radio Stations & Broadcast Companies |
| KWVT | 503-930-7228 | Advertising - Television |
| KYKN Radio | 503-390-3014 | Radio Stations & Broadcast Companies |