Pierce County is the second most populous county in the U.S. state of Washington. Formed out of Thurston County on December 22, 1852, by the legislature of Oregon Territory**, it was named for U.S. President Franklin Pierce. As of 2004, the population was 744,000. The county seat is Tacoma, on Commencement Bay, also the county's largest city.
Pierce County is notable for being home to the Mount Rainier volcano, the tallest mountain in the Cascade Range. Its most recent recorded eruption was between 1820 and 1854. There is no imminent risk of eruption, but geologists expect that the volcano will erupt again. If this should happen, parts of Pierce County and the Puyallup Valley would be at risk from lahars, lava, or pyroclastic flows. The Mount Rainier Volcano Lahar Warning System was established in 1998 to assist in the evacuation of the Puyallup River valley in case of eruption.
There were 260,800 households out of which 35.90% had children under the age of 18 living with them, 52.80% were married couples living together, 11.80% had a female householder with no husband present, and 30.90% were non-families. 24.30% of all households were made up of individuals and 7.60% had someone living alone who was 65 years of age or older. The average household size was 2.60 and the average family size was 3.10.
In the county, the population was spread out with 27.20% under the age of 18, 9.80% from 18 to 24, 31.30% from 25 to 44, 21.50% from 45 to 64, and 10.20% who were 65 years of age or older. The median age was 34 years. For every 100 females there were 98.90 males. For every 100 females age 18 and over, there were 96.70 males.
The median income for a household in the county was $45,204, and the median income for a family was $52,098. Males had a median income of $38,510 versus $28,580 for females. The per capita income for the county was $20,948. About 7.50% of families and 10.50% of the population were below the poverty line, including 13.20% of those under age 18 and 7.20% of those age 65 or over.
The Port of Tacoma is the sixth busiest container port in North America, and one of the 25 busiest in the world, and it plays an important part in the local economy. This deep-water port covers 2,400 acres (9.7 km²) and offers a combination of facilities and services including 34 deepwater berths, two million square feet (190,000 m²) of warehouse and office space, and 131 acres (530,000 m²) of industrial yard. One economic impact study showed that more the 28,000 jobs in Pierce County are related to the Port activities.
Washington counties | Pierce County, Washington | Seattle metropolitan area
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