Lake Marcel-Stillwater is a census-designated place (CDP) in King County, Washington, United States. The population was 1,334 at the 2020 census.
Geography
The CDP is located in northern King County. The namesake lake is in the center of the CDP, and the original settlement of Stillwater is in the south along State Route 203, on the northern edge of the Snoqualmie River bottomlands. The CDP is east of Redmond and east of downtown Seattle.
According to the United States Census Bureau, the CDP has a total area of , of which are land and , or 4.27%, are water.
Demographics
At the 2000 census there were 1,381 people, 441 households, and 381 families in the CDP. The population density was 1,071.5 people per square mile (413.3/km<sup>2</sup>). There were 453 housing units at an average density of 351.5/sq mi (135.6/km<sup>2</sup>). The racial makeup of the CDP was 94.71% White, 0.22% African American, 0.36% Native American, 0.58% Asian, 0.07% Pacific Islander, 1.59% from other races, and 2.46% from two or more races. Hispanic or Latino of any race were 3.91%. Its sole comprehensive high school is Cedarcrest High School.