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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 |
|---|---|---|---|---|
| Bellevue | King | 1704 | 108th Ave NE/Cross Kirkland Railroad Corridor Cross Kirkland Railroad Corridor Boundary Crosswalk 108th Ave NE/NE 38th Pl |
10534 10535 10536 |
| Camas | Clark | 0602 | Johnson Annexation Nourse Road Annexation |
25-007 25-008 |
| College Place | Walla Walla | 3636 | De-Annexation | 25-007 |
| College Place | Walla Walla | 3601 | 25-008 | |
| Ephrata | Grant | 1303 | 25-04 | |
| Grandview | Yakima | 3901 | Wilson & Hansen Annexation | 2025-09 |
| Kelso | Cowlitz | 0803 | City of Kelso Annexation | 24-4013 |
| Kettle Falls | Stevens | 3303 | 1839 | |
| Kirkland | King | 1716 | 108th Ave NE/Cross Kirkland Railroad Corridor Cross Kirkland Railroad Corridor Boundary Crosswalk 108th Ave NE/NE 38th Pl |
R-5689 R-5690 R-5691 |
| Lynden | Whatcom | 3705 | SW Lynden Annexation Amendment Weg Annexation Amendment Gosal Annexation Amendment |
25-1710 25-1711 25-1712 |
| Mansfield | Douglas | 0903 | 541 | |
| Monroe | Snohomish | 3112 | Monroe 30 Annexation | 013/2025 |
| Mountlake Terrace | Snohomish | 3113 | 24229 48th Ave W Annexation | 2896 |
| Mukilteo | Snohomish | 3114 | 1513 | |
| Napavine | Lewis | 2105 | Amends 2025-04-161 |
2025-04-161 2025-08-163 |
| Omak | Okanogan | 2407 | Tollefson Annexation City of Omak Annexation |
1950 1958 |
| Othello | Adams | 0103 | Hampton Annexation | 1635 |
| Pasco | Franklin | 1104 | ANX 2025-001 | 4786 |
| Ridgefield | Clark | 0604 | Marx Annexation | 1451 |
| Ritzville | Adams | 0104 | Grainery District-South Parcel Annexation | 2192 |
| Royal City | Grant | 1311 | 25-01 | |
| Shelton | Mason | 2301 | 2030-0625 | |
| Starbuck | Columbia | 0702 | Lubla Addition Annexation Amendment | 2025-04 |