Duvall is a city in King County, Washington, United States, located on SR 203, halfway amongst Monroe and Carnation. The population was 6,695 at the 2010 census and is estimated to be 8,061 as of 2018.

The area that became known as Duvall was historically the home of the Snoqualmie and supplementary ancestral Tulalip Native American tribes. Following their relocation below the Treaty of Point Elliott, the area was homesteaded by veterans of the Civil War. The center of present-day town was located upon a hillside homesteaded by Francis and James Duvall, loggers who arrived in 1871.

An prematurely milestone in the pact of Duvall proper was the relocation of the town of Cherry Valley. Around 1909, the Chicago, Milwaukee and St. Paul Railroad agreed to upset Cherry Valley homes and businesses to Duvall in order to continue the construction of a railroad heritage along the Snoqualmie River. The newly relocated town, briefly named Cosgrove after Samuel G. Cosgrove, underwent a real estate boom; streets and sidewalks were laid and a train depot was constructed. This was followed by construction of a movie house, a drug store, a supplementary schoolhouse, and several hotels. By 1911, the Duvall Citizen began publishing regular editions of news events.

On April 28, 1968, nearly 3,000 fans attended a rock concert at a farm in Duvall where an upright piano was dropped from a helicopter. Performances included Country Joe and the Fish. This concert is capably known to locals as the Piano Drop. This business inspired the Sky River Rock Festival which occurred difficult that year.

The town of Duvall has experienced a great amount of construction during the epoch of 2008–2009 later the determination of making the one-road town middle more accessible and presentable to tourists.