Who Is The Longest-Serving Federal Reserve Chairman In History?

Janet Yellen is set to become not only the first woman heading the Federal Reserve but also the oldest at 67 years and five months when she assumes the post on Feb. 1, 2014. Her predecessor, Ben Bernanke, was only 52 when he assumed command in 2006. Here is a list of the longest-serving chairmen of the U.S. central bank, starting with the one who served the longest. 1. William M. Martin: 18 years and 9 months, from 1951 to 1970 2. Alan Greenspan: 18 years and five months, from 1987 to 2006