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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 | Jericho Road Annexation | 25-17 |
| Richland | Benton | 0304 | Keene Road Annexation | 34-17 |
| Wenatchee | Chelan | 0405 | Morley Annexation Area | 2017-14 |
| Wenatchee | Chelan | 0405 | Shieni Annexation | 2017-21 |
| La Center | Clark | 0603 | 2017-08 | |
| Vancouver | Clark | 0605 | Vancouver Mall North Annexation | M-4196 |
| Warden | Grant | 1313 | 776 | |
| Elma | Grays Harbor | 1403 | 1148 | |
| Elma | Grays Harbor | 1403 | 1160 | |
| Issaquah | King | 1714 | King County Island | 2803 |
| Issaquah | King | 1714 | Bellevue Utility Parcel Island | 2804 |
| Maple Valley | King | 1720 | Rainier Ridge | O-17-612 |
| Redmond | King | 1724 | NE Rose Hill Annexation | 2890 |
| Renton | King | 1725 | Rezoning of previous annexation | 5858 |
| Bremerton | Kitsap | 1801 | 5320 | |
| Shelton | Mason | 2301 | 1898-0417 | |
| Bonney Lake | Pierce | 2701 | Kelly Creek Vista Potential Annexation Area | 1572 |
| Stanwood | Snohomish | 3116 | Schmakeit Annexation | 1446 |
| Sultan | Snohomish | 3117 | 124th Street Annexation | 1261-17 |
| Lacey | Thurston | 3402 | 1512 | |
| College Place | Walla Walla | 3601 | 17-032 | |
| Walla Walla | Walla Walla | 3604 | 2017-08 | |
| Walla Walla | Walla Walla | 3604 | 2017-17 | |
| Pullman | Whitman | 3812 | 17-8 | |
| Pullman | Whitman | 3812 | 17-9 | |
| Grandview | Yakima | 3901 | res 2013-27 |
