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 |
Location
Code |
Annexation
Name |
Ordinance
Number |
| Othello | 103 | Othello Port District | 1262 |
| Kalama | 802 | Meeker Drive | 1204 |
| Moses Lake | 1309 | Engle | 2343 |
| Moses Lake | 1309 | Fielding/McDowall | 2354 |
| Moses Lake | 1309 | Friday/St. Marie | 2345 |
| Quincy | 1310 | Morris | 07-210 |
| Quincy | 1310 | Chase | 07-212 |
| Quincy | 1310 | Cizik | 07-211 |
| Redmond | 1724 | West Lk Sammamish ROW | 2286 |
| Renton | 1725 | Marshall | 5315 |
| Renton | 1725 | Benson Hill | 5327 |
| Renton | 1725 | Merritt II | 5318 |
| Port Orchard | 1802 | | 033-07 |
| Port Orchard | 1802 | | 030-07 |
| Port Orchard | 1802 | Tallman | 038-07 |
| Ellensburg | 1902 | Simpson | 4470 |
| Ellensburg | 1902 | Snowden | 4478 |
| Auburn | 1702 | West Hill | 6122 |
| Auburn | 1702 | Lea Hill | 6121 |
| Burlington | 2902 | State Route 20 | 1637 |
| Stanwood | 3116 | Bryant Well | 1220 |
| Spokane | 3210 | North Division | C34170 |
| Olympia | 3403 | | 6488 |
| College Place | 3601 | Seri | 991 |
| Lynden | 3705 | | 1302 |
| Yakima | 3913 | West Powerhouse II | 2007-46 |