John Gioia
John Gioia | |
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Portrait of John Gioia | |
| Nationality | American |
| Alma mater | UC Berkeley School of Law |
| Occupation | County Supervisor |
| Years active | 1998 to Present |
John Gioia is an American politician. He has served on the Contra Costa County Board of Supervisors in Contra Costa County, California since 1998 and was re-elected three times. He served as chair in 2002, 2006 and 2010. John Gioia is a Democrat. Contra Costa supervisorial seats are non-partisan.