Washington Population By County in 2018
Updated on January 27, 2024.
According to the US Census Bureau population estimates, there were 7,526,793 people living in Washington in 2018. King County was the most populated county with 2,228,488 residents, followed by Pierce County with 894,951 residents, and Snohomish County with 814,107 residents. Garfield County with a population of 2,257 was the least populated county in Washington in 2018.
Use the map below to interactively explore the population for each county in Washington in 2018. The data can also be explored further by sorting and filtering with the table below.
You can see similar information for other states and by state for the United States.
Related Topics: Washington Census Vintage Data Topic List.
Data Source: US Census Bureau (Vintage).
See this for other years:
Washington Population By County in 2018
Table of Washington Population By County in 2018
Items per page:
0 of 0
| County | Population | % of State Population |
|---|---|---|
| Adams | 19,640 | 0.26% |
| Asotin | 22,699 | 0.30% |
| Benton | 201,174 | 2.67% |
| Chelan | 76,612 | 1.02% |
| Clallam | 76,792 | 1.02% |
| Clark | 482,467 | 6.41% |
| Columbia | 4,055 | 0.05% |
| Cowlitz | 108,673 | 1.44% |
| Douglas | 42,518 | 0.56% |
| Ferry | 7,661 | 0.10% |
| Franklin | 93,950 | 1.25% |
| Garfield | 2,257 | 0.03% |
| Grant | 96,497 | 1.28% |
| Grays Harbor | 73,787 | 0.98% |
| Island | 84,391 | 1.12% |
| Jefferson | 31,864 | 0.42% |
| King | 2,228,488 | 29.61% |
| Kitsap | 269,583 | 3.58% |
| Kittitas | 47,341 | 0.63% |
| Klickitat | 22,095 | 0.29% |
| Lewis | 79,466 | 1.06% |
| Lincoln | 10,708 | 0.14% |
| Mason | 65,533 | 0.87% |
| Okanogan | 42,058 | 0.56% |
| Pacific | 22,052 | 0.29% |
| Pend Oreille | 13,583 | 0.18% |
| Pierce | 894,951 | 11.89% |
| San Juan | 16,991 | 0.23% |
| Skagit | 127,728 | 1.70% |
| Skamania | 11,920 | 0.16% |
| Snohomish | 814,107 | 10.82% |
| Spokane | 513,502 | 6.82% |
| Stevens | 45,305 | 0.60% |
| Thurston | 285,672 | 3.80% |
| Wahkiakum | 4,343 | 0.06% |
| Walla Walla | 60,778 | 0.81% |
| Whatcom | 225,098 | 2.99% |
| Whitman | 49,821 | 0.66% |
| Yakima | 250,633 | 3.33% |