| NCNorth Central Construction | Moses Lake | WA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| NYNorthcoast Yachts | Tacoma | WA | Transportation Equipment Manufacturing336612 | — | ◇ UNVERIFIED |
| NMNorthern Marine Site | Anacortes | WA | Primary Metal Manufacturing331421 | — | ◇ UNVERIFIED |
| NMNorth Marina Ameron Hulbert | Everett | WA | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| NMNorth Marina Bayside Abw Site | Everett | WA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| NPNorth Pacific Industrial Coatings Kent | Kent | WA | Machinery Manufacturing333923 | — | ◇ UNVERIFIED |
| NSNorth Star Ice Equipment | Seattle | WA | Machinery Manufacturing333415 | — | ◇ UNVERIFIED |
| NSNorth Star Yachts Site | Kalama | WA | Chemical Manufacturing325181 | — | ◇ UNVERIFIED |
| NBNorthwest Bedding | Spokane | WA | Transportation Equipment Manufacturing336612 | — | ◇ UNVERIFIED |
| NCNorthwest Castings | Seattle | WA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| NDNorthwest Detention Center | Tacoma | WA | Food Manufacturing311213 | — | ◇ UNVERIFIED |
| NMNorthwest Marine Industries | Ferndale | WA | Transportation Equipment Manufacturing336612 | — | ◇ UNVERIFIED |
| NPNorthwest Pet Products | Woodland | WA | Food Manufacturing311111 | — | ◇ UNVERIFIED |
| NPNorthwest Precision INC | Sumner | WA | Fabricated Metal Product Manufacturing332710 | 1-19 | ◇ UNVERIFIED |
| NSNorthwest Steel Fab INC Deer Park | Deer Park | WA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| NMNw Market St Site | Seattle | WA | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| OSOberto Sausage CO Kent Plant | Kent | WA | Food Manufacturing311612 | — | ◇ UNVERIFIED |
| OSObi Seafoods LLC Arlington | Arlington | WA | Food Manufacturing311710 | — | ◇ UNVERIFIED |
| OCOccidental Chemical Corporation Site | Tacoma | WA | Chemical Manufacturing325181 | — | ◇ UNVERIFIED |
| OBOcean Beauty Seafoods-llc-ewing Street | Seattle | WA | Food Manufacturing311710 | — | ◇ UNVERIFIED |
| OCOcean Cold LLC Westport | Westport | WA | Food Manufacturing311712 | — | ◇ UNVERIFIED |
| OFOcean Fresh Seafood M/v Ocean Fresh | Seattle | WA | Food Manufacturing311710 | — | ◇ UNVERIFIED |
| OROil Re Refining CO INC - Kennewick Facility | Kennewick | WA | Petroleum and Coal Products Manufacturing324191 | — | ◇ UNVERIFIED |
| OBOld Brewhouse Former Paint Shop | Tumwater | WA | Beverage and Tobacco Product Manufacturing312112 | — | ◇ UNVERIFIED |
| OBOldcastle Buildingenvelope Vancouver | Battle Ground | WA | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| OCOlympic Chemical CORP | Tacoma | WA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| OWOmak Wood Products Site | Omak | WA | Wood Product Manufacturing321000 | — | ◇ UNVERIFIED |
| OEOnsite Environmental | Redmond | WA | Computer and Electronic Product Manufacturing334513 | — | ◇ UNVERIFIED |
| OIOregon Iron Works INC 3001 | Vancouver | WA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| OPOregon Potato Company | Pasco | WA | Food Manufacturing311423 | — | ◇ UNVERIFIED |
| OBOsprey Boat Company Metcalf St | Sedro-woolley | WA | Transportation Equipment Manufacturing336612 | — | ◇ UNVERIFIED |
| OIOxbo International CORP | Lynden | WA | Machinery Manufacturing333111 | — | ◇ UNVERIFIED |
| PBPaccar Building | Bellevue | WA | Transportation Equipment Manufacturing336120 | — | ◇ UNVERIFIED |
| PNPace National LP | Kirkland | WA | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| PCPacific Car and Foundry CO | Renton | WA | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| PCPacific Coast Canola | Warden | WA | Food Manufacturing311224 | — | ◇ UNVERIFIED |
| PCPacific Coast Producers | Yakima | WA | Food Manufacturing311421 | — | ◇ UNVERIFIED |
| PCPacific Crest Industries INC | Kent | WA | Fabricated Metal Product Manufacturing332116 | — | ◇ UNVERIFIED |
| PDPacific Die Casting | Vancouver | WA | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| PGPacific Grinding Wheel CO | Marysville | WA | Nonmetallic Mineral Product Manufacturing327910 | — | ◇ UNVERIFIED |
| PIPacific Industrial Supply Director St | Seattle | WA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| PNPacific Northwest Plating | Vancouver | WA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| PNPacific Northwest Print and Fulfillment | Spokane | WA | Machinery Manufacturing333618 | — | ◇ UNVERIFIED |
| POPacific Office Automation | Seattle | WA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| PPPacific Powder Site | Olympia | WA | Chemical Manufacturing325920 | — | ◇ UNVERIFIED |
| PRPacific Rendering CO INC | Seattle | WA | Food Manufacturing311613 | — | ◇ UNVERIFIED |
| PSPacific Services and Mfg Woodinville | Woodinville | WA | Electrical Equipment, Appliance & Component Manufacturing335991 | — | ◇ UNVERIFIED |
| PTPacific Truck Centers | Ridgefield | WA | Fabricated Metal Product Manufacturing332439 | — | ◇ UNVERIFIED |
| PWPacific Wood Treating CORP | Ridgefield | WA | Wood Product Manufacturing321114 | — | ◇ UNVERIFIED |
| PSPallet Services INC Tacoma | Tacoma | WA | Wood Product Manufacturing321920 | — | ◇ UNVERIFIED |
