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King County, WA Demographics

King County, WA is the most populous of 39 counties in Washington, with 2,269,568 residents across 2,116 square miles. That is about 1,073 people per square mile.

At the 2020 census

Population 2,269,568
Land area 2,116 sq mi
Density 1,073 / sq mi

Data: 2020 Census · American Community Survey 2024

How King County compares to the US

We're computing this county's comparison table — check back shortly. Population, land area, and density above are already exact.

Central Location: King County, WA

Measured from the county's main population center using 2020 census blocks.

We're computing the drive-time and radius areas around King County, WA — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.

Census tracts in King County, WA

Name Population Sq mi Per sq mi
Census Tract 322.20 8,837 2.4 3,758
Census Tract 323.21 7,837 4.9 1,588
Census Tract 323.13 7,670 5.1 1,517
Census Tract 327.04 7,644 6.5 1,180
Census Tract 86 7,639 0.3 27,813
Census Tract 228.03 7,566 1.8 4,106
Census Tract 205 7,451 1.1 7,090
Census Tract 308.01 7,411 2.7 2,759
Census Tract 296.02 7,288 2.6 2,832
Census Tract 323.25 7,196 0.9 8,422
Census Tract 230 7,193 1.3 5,597
Census Tract 289.02 7,177 0.8 9,001
Census Tract 256.02 7,173 2.0 3,526
Census Tract 56 7,130 1.2 6,109
Census Tract 288.02 6,976 0.9 7,536
Census Tract 320.05 6,956 2.4 2,879
Census Tract 221.02 6,921 1.8 3,830
Census Tract 323.18 6,903 2.8 2,440
Census Tract 233 6,895 1.4 4,975
Census Tract 303.08 6,883 0.8 8,276
Census Tract 324.02 6,828 9.7 703
Census Tract 229.02 6,821 1.4 4,994
Census Tract 322.21 6,818 13.7 496
Census Tract 316.03 6,801 21.7 314
Census Tract 95 6,747 1.0 6,744
Census Tract 320.10 6,720 2.0 3,295
Census Tract 312.02 6,718 25.7 261
Census Tract 236.03 6,705 0.8 8,606
Census Tract 324.01 6,677 21.7 307
Census Tract 273 6,670 1.4 4,867
Census Tract 286 6,662 2.5 2,705
Census Tract 232.01 6,652 0.6 10,979
Census Tract 323.23 6,630 1.3 5,216
Census Tract 323.17 6,617 1.7 3,901
Census Tract 250.06 6,613 8.7 764
Census Tract 113 6,600 1.3 4,999
Census Tract 268.01 6,594 0.6 11,080
Census Tract 300.03 6,592 1.8 3,708
Census Tract 57 6,586 2.0 3,354
Census Tract 236.04 6,581 1.1 5,869
Census Tract 94 6,566 0.7 10,085
Census Tract 31 6,545 0.8 7,705
Census Tract 30 6,493 0.6 11,262
Census Tract 226.03 6,488 1.1 5,817
Census Tract 295.04 6,469 0.7 8,896
Census Tract 262 6,469 6.0 1,082
Census Tract 303.10 6,466 1.2 5,224
Census Tract 305.03 6,406 1.2 5,315
Census Tract 323.07 6,401 4.5 1,430
Census Tract 321.03 6,347 1.5 4,123
Census Tract 294.03 6,306 0.9 6,784
Census Tract 226.05 6,300 1.8 3,452
Census Tract 248 6,299 1.5 4,327
Census Tract 321.04 6,294 8.6 732
Census Tract 294.05 6,269 1.0 6,515
Census Tract 290.03 6,266 1.0 6,319
Census Tract 309.02 6,262 1.5 4,153
Census Tract 312.04 6,258 14.2 440
Census Tract 99 6,257 2.5 2,479
Census Tract 268.02 6,238 0.8 7,936
Census Tract 317.04 6,201 2.2 2,808
Census Tract 283 6,194 3.1 1,968
Census Tract 219.03 6,187 1.2 5,047
Census Tract 250.05 6,163 3.0 2,077
Census Tract 300.05 6,117 0.8 7,324
Census Tract 58.01 6,116 0.7 8,692
Census Tract 218.03 6,097 1.3 4,824
Census Tract 218.02 6,090 1.9 3,224
Census Tract 323.19 6,068 2.7 2,288
Census Tract 60 6,061 0.5 11,709
Census Tract 226.06 6,060 1.1 5,691
Census Tract 251.01 6,028 1.1 5,318
Census Tract 316.04 6,017 1.6 3,752
Census Tract 264 5,982 1.8 3,279
Census Tract 210 5,966 1.0 5,877
Census Tract 97.01 5,955 0.7 8,286
Census Tract 22 5,948 1.1 5,494
Census Tract 326.04 5,941 5.0 1,186
Census Tract 323.11 5,925 9.2 647
Census Tract 284.02 5,921 3.3 1,800
Census Tract 97.02 5,911 0.9 6,895
Census Tract 303.09 5,906 0.8 6,971
Census Tract 323.16 5,892 2.4 2,447
Census Tract 202 5,887 1.0 5,884
Census Tract 277.01 5,884 17.1 345
Census Tract 27 5,876 0.6 9,603
Census Tract 323.24 5,866 0.8 7,416
Census Tract 303.06 5,864 1.4 4,099
Census Tract 267 5,856 1.2 4,917
Census Tract 96 5,847 0.7 7,950
Census Tract 325 5,835 82.5 71
Census Tract 322.15 5,813 6.2 944
Census Tract 314 5,811 2.5 2,365
Census Tract 284.03 5,787 0.8 7,220
Census Tract 274 5,781 1.3 4,502
Census Tract 306 5,776 1.3 4,427
Census Tract 219.04 5,762 1.3 4,364
Census Tract 238.07 5,750 0.3 16,801
Census Tract 293.04 5,750 1.6 3,578
Census Tract 111.01 5,747 0.4 13,093

Showing the 100 most populous of 494 — the rest are shown on the map.

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About this page

This page shows demographics for a US county from the 2020 census and the American Community Survey: population, land area, density, urban share, and how the county compares to national averages for income, housing, age, and more.

Counties subdivide into census tracts, listed below with their populations. The drive-time and radius tables measure the population around the county's main population center.

Read how BlockAtlas computes population within an area →