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is an Eastside suburb of Seattle in King County, Washington, United States. It was incorporated in 1999. The population was 34,104 at the 2000 census.
The Sammamish Plateau was part of unincorporated King County for most of its history. A vote in 1991 to join neighboring Issaquah failed, as did a vote on incorporation the following year. A renewed movement to become a city, born of frustration with development policies set by the county government, met with voter approval in 1998. Sammamish was officially incorporated on August 31, 1999.