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Washington County, OR Demographics

Washington County, OR is the 2nd most populous of 36 counties in Oregon, with 600,372 residents across 724 square miles. That is about 829 people per square mile.

At the 2020 census

Population 600,372
Land area 724 sq mi
Density 829 / sq mi

Data: 2020 Census · American Community Survey 2024

How Washington 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: Washington County, OR

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

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

Census tracts in Washington County, OR

Name Population Sq mi Per sq mi
Census Tract 315.09 10,964 7.4 1,482
Census Tract 324.04 7,561 1.4 5,283
Census Tract 321.12 7,371 2.5 2,973
Census Tract 326.03 7,323 6.9 1,061
Census Tract 308.01 7,288 1.4 5,116
Census Tract 315.14 7,254 1.1 6,821
Census Tract 315.19 7,242 1.4 5,187
Census Tract 318.04 6,711 3.7 1,793
Census Tract 315.04 6,625 1.4 4,679
Census Tract 316.06 6,587 0.9 6,984
Census Tract 316.25 6,559 0.5 12,080
Census Tract 315.20 6,535 0.9 7,674
Census Tract 333.01 6,533 1.0 6,343
Census Tract 318.13 6,486 1.7 3,736
Census Tract 302 6,430 1.8 3,539
Census Tract 329.01 6,385 4.4 1,438
Census Tract 327 6,374 84.6 75
Census Tract 326.04 6,355 1.2 5,221
Census Tract 326.06 6,327 1.0 6,236
Census Tract 333.02 6,209 26.7 233
Census Tract 319.09 6,005 1.1 5,366
Census Tract 310.05 5,943 0.9 6,725
Census Tract 306 5,928 1.2 4,948
Census Tract 320.01 5,920 3.2 1,842
Census Tract 323.02 5,864 4.7 1,235
Census Tract 330 5,759 57.9 99
Census Tract 318.06 5,748 1.0 5,947
Census Tract 309 5,721 1.3 4,326
Census Tract 316.18 5,719 0.7 8,511
Census Tract 317.06 5,630 0.6 8,891
Census Tract 315.07 5,608 1.3 4,353
Census Tract 316.14 5,551 0.6 9,896
Census Tract 317.05 5,542 0.6 8,839
Census Tract 316.17 5,516 1.1 5,062
Census Tract 314.04 5,450 0.9 5,825
Census Tract 317.07 5,420 0.7 8,221
Census Tract 319.11 5,418 0.8 6,936
Census Tract 305.01 5,344 1.4 3,885
Census Tract 308.03 5,257 0.8 6,374
Census Tract 322.01 5,254 2.6 2,011
Census Tract 316.15 5,222 0.8 6,382
Census Tract 324.07 5,202 0.9 5,774
Census Tract 321.04 5,199 1.5 3,428
Census Tract 324.09 5,131 0.4 12,523
Census Tract 310.09 5,123 0.7 7,171
Census Tract 317.03 5,122 0.9 5,464
Census Tract 314.03 5,034 1.0 5,222
Census Tract 319.15 5,000 3.3 1,501
Census Tract 320.05 4,975 1.3 3,956
Census Tract 324.14 4,971 0.7 7,220
Census Tract 315.15 4,966 1.0 4,848
Census Tract 313.02 4,894 0.8 6,312
Census Tract 301.03 4,851 1.3 3,774
Census Tract 304.01 4,790 1.6 2,996
Census Tract 315.17 4,753 0.5 9,546
Census Tract 310.08 4,732 0.7 6,533
Census Tract 319.14 4,731 0.8 5,975
Census Tract 303 4,709 1.3 3,739
Census Tract 316.24 4,652 0.7 7,139
Census Tract 319.18 4,648 0.7 6,574
Census Tract 304.02 4,583 1.2 3,946
Census Tract 324.11 4,534 0.7 6,121
Census Tract 312.02 4,493 0.4 10,770
Census Tract 329.04 4,382 3.8 1,160
Census Tract 319.12 4,345 1.1 3,838
Census Tract 319.16 4,302 0.8 5,382
Census Tract 316.19 4,284 0.5 8,871
Census Tract 316.12 4,281 0.4 10,554
Census Tract 320.03 4,239 1.9 2,240
Census Tract 321.08 4,176 1.6 2,666
Census Tract 301.04 4,175 0.9 4,496
Census Tract 305.02 4,147 0.8 5,445
Census Tract 318.14 4,135 0.7 5,653
Census Tract 324.12 4,124 0.7 5,660
Census Tract 301.06 4,119 1.0 4,290
Census Tract 332.01 4,113 0.7 5,706
Census Tract 319.17 4,081 0.9 4,795
Census Tract 324.10 4,063 0.6 6,424
Census Tract 332.02 4,058 2.7 1,494
Census Tract 315.16 4,048 0.7 5,577
Census Tract 308.05 4,025 0.9 4,522
Census Tract 335 4,011 98.9 41
Census Tract 318.16 3,966 0.6 6,395
Census Tract 316.21 3,948 1.3 2,956
Census Tract 316.20 3,918 0.6 6,502
Census Tract 331.02 3,818 2.9 1,303
Census Tract 322.02 3,797 30.5 125
Census Tract 318.07 3,748 0.6 5,968
Census Tract 316.23 3,723 1.2 3,225
Census Tract 325.03 3,710 1.5 2,511
Census Tract 315.06 3,700 0.7 5,060
Census Tract 316.22 3,589 0.4 10,061
Census Tract 321.11 3,577 4.0 897
Census Tract 321.10 3,575 4.5 794
Census Tract 318.17 3,546 0.7 5,186
Census Tract 316.16 3,496 0.3 11,334
Census Tract 315.18 3,456 0.4 9,180
Census Tract 310.11 3,437 0.7 4,605
Census Tract 318.21 3,405 0.6 6,088
Census Tract 325.01 3,369 2.0 1,694

Showing the 100 most populous of 134 — 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 →