Cedar Park is a neighborhood in the Lake City district of Seattle, Washington. The name generally refers to the residential neighborhoods east of Lake City adjoining Lake Washington. The "Cedar Park" name comes from the plats that subdivided the land along Lake Washington that had previously belonged to the Puget Mill Company. Although the ar…Cedar Park is a neighborhood in the Lake City district of Seattle, Washington. The name generally refers to the residential neighborhoods east of Lake City adjoining Lake Washington. The "Cedar Park" name comes from the plats that subdivided the land along Lake Washington that had previously belonged to the Puget Mill Company. Although the area was subdivided in the 1920s, development proceeded slowly. Many lots overlooking Lake Washington were occupied by vacation cottages from the 1920s to World War II. After 1945, the area developed as a single-family residential community. Many single-family residences in Cedar Park date from the 1950s, 1960s, and 1970s.