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Pierce County, WA Real Estate

Pierce County is the second most populous county in the U.S. state of Washington behind King County. 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 the 2010 Census, the population was 795,225. The county seat is Tacoma, which is also the county's largest city, on Commencement Bay.

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.

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