Washington Population By County in 2023

Updated on August 1, 2024.

Based on the US Census Vintage data estimates, in 2023, the population of Washington was 7,812,880. Among all Washington counties, King had the highest population (2,271,380), followed by Pierce (928,696), and Snohomish (844,761). Garfield was the least populated county (2,363).

Hover over or click on the counties in the map below to see the populations. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.

You can see similar information for other states and by state for the United States.

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Washington Population By County in 2023
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County Population % of State Population
Adams 20820 0.27
Asotin 22549 0.29
Benton 215219 2.76
Chelan 79997 1.02
Clallam 77616 0.99
Clark 521150 6.67
Columbia 4053 0.05
Cowlitz 112864 1.45
Douglas 44798 0.57
Ferry 7497 0.10
Franklin 99034 1.27
Garfield 2363 0.03
Grant 102678 1.31
Grays Harbor 77290 0.99
Island 86267 1.10
Jefferson 33714 0.43
King 2271380 29.07
Kitsap 277658 3.55
Kittitas 45508 0.58
Klickitat 23589 0.30
Lewis 86154 1.10
Lincoln 11738 0.15
Mason 68389 0.88
Okanogan 43712 0.56
Pacific 24200 0.31
Pend Oreille 14361 0.18
Pierce 928696 11.89
San Juan 18566 0.24
Skagit 131417 1.68
Skamania 12640 0.16
Snohomish 844761 10.81
Spokane 551455 7.06
Stevens 48837 0.63
Thurston 299003 3.83
Wahkiakum 4765 0.06
Walla Walla 61568 0.79
Whatcom 231919 2.97
Whitman 48012 0.62
Yakima 256643 3.29