Duvall is a city in King County, Washington, United States.The population consists of 7,639 people as of 2014.
The area that became known as Duvall was historically the home of the Snoqualmie and other ancestral Tulalip Native American tribes. Following their relocation under the Treaty of Point Elliott, the area was homesteaded by veterans of the Civil War.The center of present-day town was located on a hillside homesteaded by Francis and James Duvall, loggers who arrived in 1871.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 well-known to locals as the Piano Drop. This event inspired the Sky River Rock Festival and Lighter Than Air Fair which occurred later that year.