Douglas B. Chaffee is an American politician and retired attorney serving as a member & Chair of the Orange County Board of Supervisors from the 4th district. Elected in November 2018, he assumed office on January 7, 2019. He previously served as a Fullerton City Councilmember. In December of 2017 he was selected to serve as Mayor Pro Tem of Fullerton and the following year he was selected as Mayor of Fullerton.