Carl Zehr (born c. 1945) is a former politician in Ontario, Canada. He was the mayor of Kitchener, Ontario from 1997 to 2014. Prior to that he was a city councillor from 1985 to 1994. As of 2014, he was the longest-serving mayor in Kitchener. He was a member of the Large Urban Mayors' Caucus of Ontario and served as its chair in 1999. He was also a member of the Big City Mayors Caucus (Canada) from 1997 to 2014.