Alderton, Washington
census-designated place in Pierce County, Washington, United States
Alderton is a census-designated place (CDP) in Pierce County, Washington, United States. As of the 2020 census, Alderton had a population of 3,274. The community is located in the Puyallup River Valley between the cities of Sumner and Orting.
Geography
Mount Rainier
The city sits in a fertile valley by the Puyallup. It is built entirely on several layers of lahar deposits. Alderton is located about 30 mi (48 km) from Mount Rainier. Based on studies of past lahar flow and the mountain's structure, the Orting plains of the Puyallup River is designated an at-risk community from Mount Rainier's lahar activity; scientists predict that lahar could reach Orting in 30 minutes and Alderton in an hour. The Mount Rainier Volcano Lahar Warning System has installed sirens throughout the area, activated by sensors on Mount Rainier.
History
The valley where Alderton is located is within the traditional lands of the Puyallup Tribe and the Muckleshoot Tribes. The Puyallup people are one of the Salish people who inhabited the Puget Sound lowlands.
“Alderton, Washington” enters the record as census-designated place in Pierce County, Washington, United States. Crown Archives preserves that source wording while asking what Alderton, Washington and census-designated can confirm, complicate or overturn.
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The strongest evidence will usually combine a dated visual record with documents produced by the authority responsible for the place. The source revision retrieved here is dated Sep 12, 2026. The linked authority identifier is Q4713761. Authority coordinates are 47.169, -122.229. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 2020.
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This entry incorporates text from “Alderton, Washington” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.