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