Matthew Edward Gonzalez (born June 4, 1965) is an American politician, lawyer, and activist. He was an important figure in San Francisco politics in the years 2000–2005, when he served on San Francisco County's Board of Supervisors and was president of the Board. In 2003, Gonzalez, running as a member of the Green Party, lost a close race for mayor of San Francisco to Democrat Gavin Newsom. In the 2008 presidential election, Gonzalez ran for vice president as the running mate of candidate Ralph Nader. He currently works in San Francisco’s Public Defender's Office.