Biohazard Cleanup Near Rivergrove Sumner, WA

Sumner is a city in northern Pierce County, Washington, in the fertile Puyallup River Valley between Puyallup to the west and Bonney Lake to the east.

Sumner was founded in 1853 as Stuck Junction by settlers who arrived by wagon train over Naches Pass; William Kincaid, whose land claim was used to plat the settlement, is considered the town's founding father.

The town was platted in 1883 by George H. Ryan in anticipation of a Northern Pacific Railway stop and was called Franklin until 1891.

In 1891 the Post Office Department asked for a new name to avoid confusion with other Franklins, abolitionist Senator Charles Sumner's name was chosen by lottery, and the town incorporated on February 7, 1891.

Sumner had a population of 10,621 at the 2020 census, living in 4,317 households, up from 9,451 residents in 2010.

Sumner bills itself as the "Rhubarb Pie Capital of the World": rhubarb has been grown in the Sumner–Puyallup Valley since the 1890s, the Knoblauch family pioneered its commercial production, and as of 2025 the majority of American rhubarb was still grown in the Sumner area.

The city celebrates its rhubarb heritage with the annual Rhubarb Days festival, held since 2011.

Sumner hosts one leg of the annual four-city Daffodil Parade each April, alongside Tacoma, Puyallup, and Orting.

The Ryan House, home of George H. Ryan and now the city's historical museum, is listed on the National Register of Historic Places, and Reuben Knoblauch Heritage Park honors the rhubarb-growing family near the train station.

Sumner station is served by Sounder commuter trains connecting the city directly to Tacoma and Seattle.