Sample of Washington Communities
The following are some of the communities located in Washington County:
| Community | 2009
Population | 2000
Population | Change
(2009 vs. 2000) |
| Hillsboro | 95,538 | 70,186 | 36.12% increase |
| Beaverton | 93,436 | 76,129 | 22.73% increase |
| Tigard | 49,254 | 41,223 | 19.48% increase |
| Forest Grove | 21,448 | 17,708 | 21.12% increase |
| Sherwood | 17,930 | 11,791 | 52.1% increase |
| Cornelius | 11,610 | 9,652 | 20.29% increase |
| King City | 2,965 | 1,949 | 52.1% increase |
| North Plains | 1,920 | 1,605 | 19.63% increase |
| Banks | 1,624 | 1,286 | 26.28% increase |
| Durham | 1,458 | 1,382 | 5.5% increase |
| Gaston | 792 | 600 | 32% increase |
Counties Neighboring Washington
The following counties adjoin and form the boundaries of Washington:
| County | Direction | 2009
Population | 2000
Population | Change
(2009 vs. 2000) |
| Clackamas |  SE | 386,143 | 338,391 | 14.11% |
| Clatsop |  NW | 37,243 | 35,630 | 4.53% |
| Columbia |  N | 49,592 | 43,560 | 13.85% |
| Multnomah |  E | 726,855 | 660,486 | 10.05% |
| Tillamook |  W | 24,889 | 24,262 | 2.58% |
| Yamhill |  SW | 99,037 | 84,992 | 16.53% |
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