Supervisor Karen Mitchoff was sworn in as Contra Costa County District IV Supervisor in January of 2011. She began her service to the County in the office of former Sherriff-Coroner Richard Rainey. She also worked as a fiscal and administrative analyst for the county's Employment and Human Services Department, and as Chief of Staff for former Supervisors Sunne Wright McPeak and Mark DeSaulnier.
Karen served on the Pleasant Hill City Council from 2008 to 2010, and as Mayor in 2010. Karen was appointed to the Pleasant Hill Recreation and Park District Board of Directors in 2003 and was elected to that Board in 2004 and 2006. She served as Chair in 2005 and 2006, and served on a variety of committees during her tenure there. Karen was appointed to the Pleasant Hill Citizens’ Advisory Committee on Redevelopment in 1988, and also served on the Planning Commission from 1992-1996.
Karen was born in Portland, Oregon. Her father was transferred to California in 1962 when she was a young girl, and the family moved to Pleasant Hill in 1965. She attended local public schools, Gregory Gardens Elementary, Valley View Middle, College Park High, and then attended Diablo Valley College, earning an A.A. degree in Business. She returned to college in 2000 (while working full time) and graduated from Cal State East Bay with a B.A. in Human Development.