John Eder is an American activist and politician from Maine. Eder lives in Waterboro. A member of the Maine Republican Party, Eder is a former member of the Maine Green Independent Party and the Maine Democratic Party. He served in the Maine House of Representatives as the legislature's first member of the Green Party for two terms and was elected in 2002 and re-elected in 2004. Until his defeat in 2006 Eder was one of only a handful of independent or third party state legislators in the country and was the highest-ranking elected Green official in the United States. Eder ran for Mayor of Portland, Maine in 2011. In 2014, Eder won a race for an at-large seat on the Portland Board of Education.