Dewey Decimal Numbers: Washington
General information about Washington is found in 979.7. Knowing the Dewey Decimal number for a county or a series of counties within a state makes it easier for a researcher to browse the shelves. The following chart lists Washington's counties in alphabetical order followed by their Dewey Decimal number.
| Adams | 979.734 | Island | 979.775 | Pierce | 979.778 |
| Asotin | 979.742 | Jefferson | 979.798 | San Juan | 979.774 |
| Benton | 979.751 | King | 979.777 | Skagit | 979.772 |
| Chelan | 979.759 | Kitsap | 979.776 | Skamania | 979.784 |
| Clallam | 979.799 | Kittitas | 979.757 | Snohomish | 979.771 |
| Clark | 979.786 | Klickitat | 979.753 | Spokane | 979.737 |
| Columbia | 979.746 | Lewis | 979.782 | Stevens | 979.723 |
| Cowlitz | 979.788 | Lincoln | 979.735 | Thurston | 979.779 |
| Douglas | 979.731 | Mason | 979.797 | Wahkiakum | 979.791 |
| Ferry | 979.725 | Okanogan | 979.728 | Walla Walla | 979.748 |
| Franklin | 979.733 | Olympic | 979.794 | Whatcom | 979.773 |
| Garfield | 979.744 | Pacific | 979.792 | Whitman | 979.739 |
| Grant | 979.732 | Pend Oreille | 979.721 | Yakima | 979.755 |
| Grays Harbor | 979.795 |
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Modified: 31 Jul 2008