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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 |
|---|---|---|---|---|
| Elma | Grays Harbor | 1403 | 1204 | |
| Kennewick | Benton | 0302 | 6001 | |
| Mattawa | Grant | 1308 | Hwang Annexation | 22-678 |
| Pasco | Franklin | 1104 | Alford-Cole Annexation | 4627 |
| Ridgefield | Clark | 0604 | Greear/Young Annexation | 1378 |
| Wenatchee | Chelan | 0405 | Jacoby Annexation | 2022-32 |
| Grandview | Yakima | 3901 | Monarch Investment Properties Annexation | 2023-01 |
| Ridgefield | Clark | 0604 | NW 24th Avenue Annexation | 1389 |
| Wenatchee | Chelan | 0405 | River Academy Annexation | 2023-01 |
