Fred Eisenberger (born September 3, 1952) is a Canadian politician and former real estate agent who was the 57th mayor of Hamilton from 2014 to 2022. Eisenberger previously served as chair of the Hamilton Port Authority prior to his first election. He served as the 55th mayor from 2006 to 2010, and was succeeded by Bob Bratina, but was elected mayor again in 2014 and 2018 to four-year terms.