Washington
| Company | Category | Area | Address | Web | Contact person | |
| THREE ROSES | Unclassified | Washington | 701 16TH ST, BELLINGHAM, Whatcom, Washington, 98225-6318, USA | - | - | Beverly Jones |
| THREE RULES CONSTRUCTION | Single-family House Constructi | Washington | 4203 UNIVERSITY WAY NE, SEATTLE, King, Washington, 98105-5806, USA | - | - | - |
| THREE RUSTY NAILS RANCH | Sport/recreation Camp Sport/re | Washington | 115 OLD WYNOOCHE RD, MONTESANO, Grays Harbor, Washington, 98563-9727, USA | - | - | Don Schmidt |