 After the incorporation of Lake Forest Park in 1961, the remainder of the Shoreline School District remained an unincorporated portion of King County.The school district remained the main identifier for the area for several decades; a set of welcome signs were installed in 1983 by the Shoreline Chamber of Commerce bearing the name.The City of Seattle began studying an annexation of the area in 1988, causing local residents to organize an incorporation measure to retain their separate school system.