| County | Construction | Manufacturing | Wholesaling | Retailing | Services | Other | Total |
| Adams | 7 | 3 | 7 | 30 | 27 | 28 | 102 |
| Asotin | 5 | 4 | 2 | 30 | 38 | 15 | 94 |
| Benton | 143 | 14 | 12 | 185 | 343 | 81 | 778 |
| Chelan | 69 | 7 | 14 | 87 | 128 | 81 | 386 |
| Clallam | 82 | 19 | 16 | 99 | 183 | 55 | 454 |
| Clark | 520 | 38 | 54 | 497 | 858 | 282 | 2,249 |
| Columbia | 3 | 2 | 2 | 11 | 8 | 1 | 27 |
| Cowlitz | 116 | 26 | 15 | 182 | 238 | 80 | 657 |
| Douglas | 33 | 4 | 2 | 40 | 61 | 22 | 162 |
| Ferry | 6 | 3 | 1 | 13 | 15 | 5 | 43 |
| Franklin | 38 | 3 | 8 | 39 | 55 | 34 | 177 |
| Garfield | 2 | 1 | -- | 4 | 2 | 3 | 12 |
| Grant | 73 | 12 | 12 | 119 | 164 | 65 | 445 |
| Grays Harbor | 77 | 39 | 15 | 130 | 165 | 100 | 526 |
| Island | 74 | 13 | 15 | 154 | 241 | 88 | 585 |
| Jefferson | 49 | 9 | 12 | 78 | 104 | 33 | 285 |
| King | 1,664 | 255 | 687 | 3,581 | 7,535 | 2,143 | 15,865 |
| Kitsap | 214 | 26 | 24 | 379 | 460 | 134 | 1,237 |
| Kittitas | 27 | 9 | 6 | 51 | 49 | 23 | 165 |
| Klickitat | 34 | 4 | 4 | 30 | 57 | 15 | 144 |
| Lewis | 71 | 27 | 13 | 153 | 197 | 78 | 539 |
| Lincoln | 9 | 4 | 4 | 14 | 22 | 12 | 65 |
| Mason | 62 | 8 | 13 | 109 | 109 | 39 | 340 |
| Okanogan | 44 | 14 | 22 | 91 | 111 | 44 | 326 |
| Pacific | 23 | 12 | 5 | 44 | 61 | 19 | 164 |
| Pend Oreille | 13 | 3 | 2 | 11 | 24 | 1 | 54 |
| Pierce | 742 | 81 | 139 | 928 | 1,586 | 474 | 3,950 |
| San Juan | 40 | 6 | 12 | 66 | 114 | 32 | 270 |
| Skagit | 137 | 33 | 43 | 275 | 423 | 110 | 1,021 |
| Skamania | 14 | 5 | 2 | 13 | 25 | 6 | 65 |
| Snohomish | 919 | 93 | 171 | 1,006 | 1,742 | 487 | 4,418 |
| Spokane | 377 | 45 | 62 | 518 | 779 | 297 | 2,078 |
| Stevens | 58 | 19 | 6 | 75 | 108 | 31 | 297 |
| Thurston | 260 | 33 | 74 | 533 | 926 | 232 | 2,058 |
| Wahkiakum | 2 | 2 | 2 | 7 | 5 | 5 | 23 |
| Walla Walla | 37 | 9 | 13 | 103 | 119 | 30 | 311 |
| Whatcom | 215 | 32 | 69 | 253 | 423 | 143 | 1,135 |
| Whitman | 12 | 6 | 9 | 74 | 74 | 20 | 195 |
| Yakima | 138 | 17 | 29 | 196 | 243 | 135 | 758 |
| Out of State | 1,178 | 140 | 698 | 1,104 | 2,111 | 829 | 6,060 |
| TOTAL | 7,587 | 1,080 | 2,296 | 11,312 | 19,933 | 6,312 | 48,520 |
| *Based on opening date and industrial category indicated on Master Business Application. Includes new businesses, reorganizations of existing firms, reopens of former accounts, and firms with no activity; excludes miscellaneous tax accounts. Starting 7/1/96, non-retail firms with less than $12,000 annual gross income are not registered. | |||||||