Dave Upthegrove is a descendant of the German Op den Graeff family of Dutch origin.^[2] He was a direct descendant of Herman op den Graeff, mennonite leader of Krefeld, and his grandson Abraham op den Graeff, one of the founders of Germantown and in 1688 signer of the first protest against slavery in colonial America.

Dave Upthegrove was born and raised in King County, Washington and attended Lakeside School in Seattle. He earned a Bachelor of Arts degree in environmental conservation from the University of Colorado Boulder and a graduate certificate in energy policy planning from the University of Idaho.^[3]

Upthegrove was appointed to the Washington House of Representatives in January 2002 and was elected to a two-year term in November 2002. He was then re-elected at two-year intervals until running for King County Council.^{[citation needed]}

While serving in the Washington House of Representatives, Upthegrove was chair of the Environment Committee and also served on the Local Government and Transportation Committee. He is a former chair of the Select Committee on Puget Sound. He has been involved in education policy, sponsoring and passing legislation to improve the teaching of civics and to better meet the needs of recent immigrant students. The Washington Conservation Voters called Upthegrove "a leader on environmental issues and a rising star in the House." Upthegrove led high-profile environmental initiatives to clean up Puget Sound and to clean up soil at schools and day cares contaminated by a local Asarco copper smelter.^{[citation needed]}

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