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The cities below have imposed annexations increasing their boundaries. Sales tax rates for businesses included in the annexation may be affected. More information can be obtained from the respective city planning departments.
| City | County | Location Code | Annexation Name | Ordinance Number |
|---|---|---|---|---|
| Richland | Benton | 0304 | Zinsli Annexation | 50-20 |
| Eprata | Grant | 1303 | 20-04 | |
| Woodinville | King | 1735 | 703 | |
| Okanogan City | Okanogan | 2406 | 1206 | |
| Kettle Falls | Stevens | 3303 | 1787 | |
| Kettle Falls | Stevens | 3303 | 1788 | |
| Kettle Falls | Stevens | 3303 | 1789 | |
| Lacey | Thurston | 3402 | 1570 | |
| College Place | Walla Walla | 3601 | 20-009 | |
| College Place | Walla Walla | 3601 | 20-010 | |
| Walla Walla | Walla Walla | 3604 | Cox Annexation | 2020-52 |
