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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 |
|---|---|---|---|---|
| Chelan | Chelan | 0402 | Chelan Fruit Annexation | 2019-1572 |
| Leavenworth | Chelan | 0404 | 1600 | |
| Wenatchee | Chelan | 0405 | White Annexation | 2019-28 |
| Wenatchee | Chelan | 0405 | Isola Annexation | 2020-02 |
| Wenatchee | Chelan | 0405 | Tramp Annexation | 2020-03 |
| Ridgefield | Clark | 0604 | Gress Annexation | 1303 |
| Pasco | Franklin | 1104 | 4468 | |
| Carnation | King | 1707 | Falkenberg Annexation | 926 |
| Renton | King | 1725 | Bill Annexation | 5949 |
| Ellensburg | Kittitas | 1902 | 2019-18 | |
| Centralia | Lewis | 2101 | Southwest Fairgrounds Annexation | 2435 |
| Newport | Pend Oreille | 2605 | 2061 | |
| Newport | Pend Oreille | 2605 | 2062 | |
| Hamilton | Skagit | 2904 | 07-2019 | |
| Lake Stevens | Snohomish | 3109 | Southeast Island Annexation | 1053 |
| Yelm | Thurston | 3407 | 1054 | |
| Nooksack | Whatcom | 3706 | Breckenridge Annexation | 712 |
| Oakesdale | Whitman | 3810 | 636 | |
| Grandview | Yakima | 3901 | John and Jacque LaFever Annexation | 2020-1 |
| Grandview | Yakima | 3901 | Charvet Brothers Farms Annexation | 2020-2 |
| Harrah | Yakima | 3903 | 2019-5 |
