John Robert Marks III, the former Mayor of Tallahassee, Florida was succeeded by an American politician who became the youngest person ever elected to Tallahassee City Commission.
John Robert Marks III (born July 25, 1947) is an American lawyer, politician, and former Mayor of Tallahassee, Florida from February 2003 until November 2014. 
 He was succeeded by Andrew Gillum on November 21, 2014. 
Andrew D. Gillum (born July 26, 1979) is an American politician who serves as the mayor and formerly served as a city commissioner of Tallahassee, Florida. 
 At the age of 23, Gillum became the youngest person ever elected to the Tallahassee City Commission in February 2003. 
