Census 2010: Washington › Counties

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Washington by county

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County name 2010 total population 2000 total population Total change
since 2000
2010 White population 2010 White percentage White change
since 2000
King County 1,931,249 1,737,034 11.2% 1,325,845 119,801 16,147 282,075 14,486 76,096 96,799 172,378 1,758,871 54.9% 851,261 68.7% 6.2% 0.8% 14.6% 0.8% 3.9% 5.0% 8.9% 91.1% 44.5% 62,029 0.8% 27.6% 1.4% 50.2% 60.7% 71.1% 37.3% 81.0% 7.1% 7.3%
Pierce County 795,225 700,820 13.5% 590,040 53,998 10,879 47,501 10,588 27,872 54,347 72,849 722,376 50.0% 325,375 74.2% 6.8% 1.4% 6.0% 1.3% 3.5% 6.8% 9.2% 90.8% 41.7% 25,457 7.4% 10.8% 9.2% 33.5% 78.8% 80.9% 51.6% 88.6% 9.1% 7.8%
County name Total
households
Husband/wife
with children
Husband/wife
no children
Single male
with children
Single male
living alone
Single female
with children
Single female
living alone
King County 789,232 20.1% 25.2% 1.9% 14.6% 5.1% 16.4%
Pierce County 299,918 20.9% 28.1% 2.9% 11.6% 8.0% 13.5%
County name Family
households
Family
households %
Families
with kids
Families
with kids %
Non-family
households
Non-family
households %
Households
with seniors
Households
with seniors %
King County 461,510 58.5% 213,507 27.1% 327,722 41.5% 154,215 19.5%
Pierce County 202,174 67.4% 95,397 31.8% 97,744 32.6% 63,783 21.3%
County name Under 10 10-19 20-29 30-39 40-49 50-59 60-69 70-79 80 plus
King County 12.1% 11.8% 15.0% 15.6% 15.3% 14.0% 8.8% 4.2% 3.2%
Pierce County 13.7% 14.0% 14.4% 13.4% 14.5% 13.7% 8.8% 4.5% 2.9%
County name Total population Median age Male total Male percentage Female total Female percentage
King County 1,931,249 37.1 962,090 49.8% 969,159 50.2%
Pierce County 795,225 35.9 392,934 49.4% 402,291 50.6%

* The USA TODAY Diversity Index represents the probability that two people from this area will have different ethnic backgrounds. A higher number reflects a more ethnically diverse population.

Credits: Ryan Pitts, Mike Tigas Special thanks: USA Today Census team