Francis K. (Frank) Koehn is an American activist and politician in Northern Wisconsin. He was the first Green Party candidate to be elected to office in the United States when he was elected Bayfield County supervisor on the ticket in 1986. Koehn's 12 years on the Board of Supervisors (1986–1998) is one of the longest tenures in elected office for any Green Party member, and after Dave Conley (22 years) is the second longest among Wisconsin Greens. Koehn has also been active in environmental, treaty rights and human rights causes including opposition to the Crandon and White Pine mines, support of Ojibwe treaty rights, and support for the proposed to the US Constitution. Koehn has paid particular efforts to preserving Lake Superior. In many of these causes, Koehn worked closely with Walt