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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 |
|---|---|---|---|---|
| Ellensburg | Kittitas | 1902 | Calaway Annexation | 4921 |
| Kennewick | Benton | 302 | 2107 S Clodfelter Rd Annexation 1215 S Cedar St Annexation 8045 W 10th Avenue |
24-0656 24-6052 24-6064 |
| Lacey | Thurston | 3402 | Cuoio Park Annexation | 1660 |
| Mountlake Terrace | Snohomish | 3113 | 240th St SW Annexation | 2848 |
| Okanogan | Okanogan | 2406 | 1228 | |
| Omak | Okanogan | 2407 | 1943 | |
| Redmond | King | 1724 | Rose Hill NE 97th St Annexation | 3165 |
| Ridgefield | Clark | 604 | Marrett Hills Estates Annexation Raptors Park Annexation |
1423 1427 |
| Sedro-Woolley | Skagit | 2908 | Hanson Annexation | 2077-24 |
| South Cle Elum | Kittitas | 1905 | Rodney T Dunn Estate | 645 |
| Sunnyside | Yakima | 3908 | Robinson Annexation Phillips Annexation |
2023-23 2024-04 |
| Toledo | Lewis | 2107 | 805 | |
| Waitsburg | Walla Walla | 3603 | Buttercup St Annexation | 2024-1088 |
| Walla Walla | Walla Walla | 3604 | 2024-08 | |
| White Salmon | Klickitat | 2003 | Annexation WS-ANX-2024-001 | 2024-06-1164 |
| Woodway | Snohomish | 3118 | Point Wells Annexation | 2024-657 |
