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Snohomish County, WA Demographics

Snohomish County, WA is the 3rd most populous of 39 counties in Washington, with 827,945 residents across 2,087 square miles. That is about 397 people per square mile.

At the 2020 census

Population 827,945
Land area 2,087 sq mi
Density 397 / sq mi

Data: 2020 Census · American Community Survey 2024

How Snohomish 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: Snohomish County, WA

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

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

Census tracts in Snohomish County, WA

Name Population Sq mi Per sq mi
Census Tract 521.07 8,325 4.8 1,729
Census Tract 533.01 7,462 9.5 783
Census Tract 417.03 7,305 1.4 5,122
Census Tract 522.03 7,170 6.7 1,074
Census Tract 416.06 7,143 1.0 7,324
Census Tract 518.03 6,998 0.6 11,342
Census Tract 518.02 6,942 1.9 3,653
Census Tract 526.07 6,670 3.9 1,701
Census Tract 533.02 6,654 34.4 194
Census Tract 417.04 6,652 1.6 4,257
Census Tract 419.01 6,645 3.4 1,945
Census Tract 508 6,619 1.2 5,363
Census Tract 507 6,596 1.2 5,516
Census Tract 520.04 6,540 1.3 5,111
Census Tract 9400.01 6,476 19.6 330
Census Tract 418.12 6,450 0.7 8,939
Census Tract 418.05 6,354 1.3 5,033
Census Tract 526.05 6,316 1.8 3,461
Census Tract 528.03 6,245 5.4 1,148
Census Tract 414 6,219 1.3 4,647
Census Tract 416.01 6,205 1.8 3,439
Census Tract 518.04 6,172 0.9 6,786
Census Tract 521.08 6,124 9.1 676
Census Tract 538.02 6,122 8.7 706
Census Tract 527.06 6,111 1.9 3,175
Census Tract 519.22 6,110 1.4 4,345
Census Tract 419.04 6,104 0.6 11,055
Census Tract 501.02 6,100 0.7 8,745
Census Tract 519.26 6,079 3.3 1,856
Census Tract 519.18 6,077 1.7 3,514
Census Tract 519.27 6,072 1.8 3,415
Census Tract 534 6,058 50.1 121
Census Tract 420.01 6,030 1.9 3,222
Census Tract 517.01 6,015 1.0 6,261
Census Tract 522.07 6,014 25.9 232
Census Tract 416.05 6,006 1.0 6,318
Census Tract 419.05 5,999 0.9 6,977
Census Tract 412.02 5,980 1.0 5,805
Census Tract 535.06 5,952 99.6 60
Census Tract 519.21 5,941 0.9 6,272
Census Tract 538.03 5,907 104.7 56
Census Tract 410 5,904 1.2 5,013
Census Tract 520.05 5,892 1.4 4,257
Census Tract 535.05 5,889 19.3 305
Census Tract 417.01 5,850 1.1 5,113
Census Tract 519.28 5,808 0.9 6,530
Census Tract 526.04 5,747 1.4 4,036
Census Tract 515 5,707 1.3 4,505
Census Tract 504.02 5,693 1.1 5,163
Census Tract 413.01 5,646 1.8 3,184
Census Tract 526.06 5,618 5.0 1,114
Census Tract 418.09 5,609 0.4 13,460
Census Tract 503 5,552 1.4 3,854
Census Tract 516.01 5,552 0.9 5,873
Census Tract 402 5,538 1.0 5,628
Census Tract 531.01 5,527 10.6 522
Census Tract 531.02 5,498 9.4 582
Census Tract 522.04 5,450 3.4 1,583
Census Tract 520.07 5,408 0.8 6,383
Census Tract 529.04 5,382 1.4 3,974
Census Tract 420.05 5,377 2.5 2,185
Census Tract 418.10 5,362 0.3 15,546
Census Tract 525.02 5,336 5.4 979
Census Tract 527.08 5,330 1.2 4,367
Census Tract 523.01 5,309 15.2 350
Census Tract 525.05 5,301 1.0 5,270
Census Tract 535.07 5,296 1.8 2,875
Census Tract 536.04 5,251 6.2 850
Census Tract 522.06 5,244 19.9 263
Census Tract 420.06 5,143 1.0 4,986
Census Tract 517.02 5,129 0.8 6,133
Census Tract 527.07 5,112 2.0 2,504
Census Tract 418.16 5,070 0.7 7,707
Census Tract 525.06 5,058 0.9 5,481
Census Tract 411 5,036 1.1 4,758
Census Tract 527.11 5,031 5.0 1,006
Census Tract 519.29 5,026 0.9 5,751
Census Tract 420.04 4,952 0.9 5,383
Census Tract 521.14 4,903 2.5 1,934
Census Tract 519.37 4,901 1.6 3,130
Census Tract 413.03 4,886 1.5 3,327
Census Tract 519.38 4,820 1.5 3,151
Census Tract 529.06 4,788 0.9 5,126
Census Tract 520.08 4,665 0.7 6,236
Census Tract 510 4,663 1.3 3,615
Census Tract 519.30 4,660 1.2 3,956
Census Tract 512 4,613 0.8 5,687
Census Tract 532.02 4,609 8.6 538
Census Tract 529.05 4,606 0.8 5,827
Census Tract 519.13 4,574 1.5 2,990
Census Tract 404 4,564 0.6 7,028
Census Tract 418.14 4,542 0.6 7,998
Census Tract 407 4,542 1.1 4,239
Census Tract 418.08 4,539 0.7 6,955
Census Tract 519.36 4,524 0.4 11,006
Census Tract 519.16 4,504 1.1 3,948
Census Tract 527.10 4,502 1.0 4,503
Census Tract 9400.02 4,493 15.1 298
Census Tract 519.31 4,474 0.7 6,426
Census Tract 528.05 4,443 1.6 2,706

Showing the 100 most populous of 173 — 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.

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