Thomas M. Cooley, Interstate Commerce Commission; March 1889 - March 1891
Eugene P. Woodruff, South Carolina; March 1891 - April 1892
George M. Woodruff, Connecticut; April 1892 - May 1894
Allen Fort, Georgia; May 1894 - May 1895
Simeon R. Billings, Michigan; May 1895 - May 1896
Isaac B. Brown, Pennsylvania; May 1896 - May 1897
Charles L. Davidson, Iowa; May 1897 - May 1898
Cicero J. Lindly, Illinois; May 1898 - February, 1902
Benjamin F. Chadbourne, Maine; February 1902 - July 1903
John V. Smith, Alabama; July 17, 1903 - November 1904
Ira B. Bills, Minnesota; November 1904 - August 1905
W.G. Smith, South Dakota; August 1905 - April 1906
John S. McMillen, Washington; April 1906 - May 1907
C.C. McChord, Kentucky; October 1907 - October 1908
Martin S. Decker, New York; October 1908 - November 1910
R. Hudson Burr, Florida; November 1910 - October 1911
Charles F. Staples, Minnesota; October 1911 - November 1912
O.P. Gothlin, Ohio; November 1912 - October 1913
Laurence B. Finn, Kentucky; November 1913 - November 1914
Clifford Thorne, Iowa; November 1914 - October 1915
Robert R. Prentis, Virginia; October 1915 - November 1916
Max Thelen, California; November 1916 - October 1917
Edward C. Niles, New Hampshire; October 1917 - November 1918
Charles E. Elmquist, Minnesota; November 1918 - October 1919
Walter A. Shaw, Illinois; October 1919 - November 1920
James A. Perry, Georgia; November 1920 - October 1921
Carl D. Jackson, Wisconsin; October 1921 - November 1922
Dwight N. Lewis, Iowa; November 1922 - December 1923
Harry G. Taylor, Nebraska; December 1923 - November 1924
William D.B. Ainey, Pennsylvania; November 1924 - October 1925
A.G. Patterson, Alabama; October 1925 - November 1926
John F. Shaughnessy, Nevada; November 1926 - October 1927
Henry G. Wells, Massachusetts; October 1927 -November 1928
Lewis E. Gettle, Wisconsin; November 1928 - August 1929
Charles Webster, Iowa; August 1929 - November 1930
Harvey H. Hannah, Tennessee; November 1930 - October 1931
John J. Murphy, South Dakota; October 1931 - November 1932
J. Paul Kuhn, Illinois; November 1932 - January 1933
Amos A. Betts, Arizona; February 1933 - June 1933
H. Lester Hooker, Virginia; July 1933 - October, 1933
Richard Thomas Higgins, Michigan; October 1933 - September 1934
Andrew R. McDonald, Wisconsin; September 1934 - October 1935
Frank P. Morgan, Alabama; October 1935 - May 1936
Thomas E. McKay, Utah; May1936 - April 1937
Alexander M. Mahood, West Virginia; April 1937 - November 1938
Nelson Lee Smith, New Hampshire; November 1938 - August 1939
Harry Bacharach, New Jersey; August 1939 - December 1940
James W. Wolfe, South Carolina; December 1940 - August 1941
Julian D. James, Missouri; August 1941 - July 1942
Frank W. Matson, Minnesota; July 1942 - September 1943
Wade O. Martin, Louisiana; September 1943 - November 1944
George C. McConnaughey, Ohio; November 1944 - January 1945
John D. Biggs, Illinois; February 1945 - November 1946
Duane T. Swanson, Nebraska; November 1946 - July 1947
Walter R. McDonald, Georgia; July 1947 - November 1948
Justus R. Craemer, California; November 1948 - August 1949
Harry M. Miller, Ohio; August 1949 - November 1950
George H. Flagg, Oregon; November 1950 - October 1951
J.C. Darby, South Carolina; October 1951 - November 1952
Eugene S. Loughlin, Connecticut; November 1952 -September 1953
C.L. “Roy” Doherty, South Dakota; September 1953 - November 1954
W.F. Whitney, Wisconsin; November 1954 - October 1956
Benjamin F. Feinberg, New York; October 1955 - July 1956
John C. Hammer, Tennessee; July 1956 - October 1957
Edward R. Thornton, New Hampshire; November 1958 - November 1958
John B. Conly, Pennsylvania; November 1958 - March 1959
Matt L. McWhorter, Georgia; April 1959 - October 1959
George R. Perrine, Illinois; October 1959 - December 1960
Peter Mitchell, California; December 1960 - September 1961
David M. Brackman, Massachusetts; September 1961 - November 1962
Joseph J. Brown, Nebraska; November 1962 - October 1963
Nat B. Knight, Jr., Louisiana; October 1962 - December 1964
Noel A. Clark, Nevada; December 1964 - October 1965
James A. Lundy, New York; October 1965 - November 1966
Frederick N. Allen, Maine; November 1966 - November 1967
James W. Karber, Illinois; November 1967 - November 1968
Harry T. Westcott, North Carolina; November 1968 - October 1969
Francis Pearson, Washington; October 1969 - November 1970
George I. Bloom, Pennsylvania; November 1970 - September 1971
Francis J. Riordan, New Hampshire; September 1971 - November 1972
Arthur L. Padrutt, Wisconsin; December 1972 - September 1973
Ben T. Wiggins, Georgia; September 1973 - December 1974
Ralph H. Wickberg, Idaho; December 1974 - November 1975
James McGirr Kelly, Pennsylvania; November 1975 - November 1976
Alexander J. Kalinski, New Hampshire; November 1976 - November 1977
Richard A. Elkin, North Dakota; November 1977 - November 1978
Norman A. Johnson, Jr., Mississippi; November 1978 - December 1979
Heber P. Hardy, Nevada, December 1979 - November 1980
Edward P. Larkin, New York, November 1980 - November 1981
Edward F. Burke, Rhode Island, November 1981 - November 1982
Larry J. Wallace, Indiana, November 1982 - November 1983
Junie L. Bradshaw, Virginia, November 1983 - November 1984
Susan M. Knowles, Alaska, November 1984 - November 1985
George H. Barbour, New Jersey, November 1985 - November 1986
Peter A. Bradford, Maine, November 1986 - November 1987
Bruce Hagen, North Dakota, November 1987 - November 1988
Henry G. Yonce, South Carolina, November 1988 - November 1989
Sharon L. Nelson, Washington, November 1989 - November 1990
William A. Badger, Maryland, November 1990 - September 1991
William D. Steinmeier, Missouri, September 1991 - November 1991
Kenneth Gordon, Maine, November 1991 - November 1992
Dennis J. Nagel, Iowa, November 1992 - November 1993
Keith Bissell, Tennessee, November 1993 - November 1994
Bob Anderson, Montana, November 1994 - November 1995
Cheryl L. Parrino, Wisconsin, November 1995 - November 1996
Bruce Ellsowrth, New Hampshire; November 1996 - November 1997
Jolynn Barry Butler, Ohio; November 1997 - November 1998
Jim Sullivan, Alabama; November 1998 - November 1999
Bob Rowe, Montana; November 1999 - November 2000
Nora Mead Brownell; November 2000 - May 2001
Bill Nugent, Maine; May 2001 - November 2002
David Svanda, Michigan; November 2002 - August 2003
Stan Wise, Georgia; August 2003 - November 2004
Marilyn Showalter, Washington; November 2004 - February 2005
Diane Munns, Iowa; February 2005 - November 2006
Jim Kerr; North Carolina; November 2006 - November 2007
Marsha Smith, Idaho; November 2007 - November 2008
Frederick F. Butler, New Jersey; November 2008 - November 2009
David C. Coen, Vermont; November 2009 - November 2010
Tony Clark, North Dakota; November 2010 - November 2011
David A. Wright, South Carolina; November 2011 - November 2012
Philip Jones, Washington; November 2012 - November 2013
Colette D. Honorable, Arkansas; November 2013 - November 2014
Lisa Edgar, Florida; November 2014 - November 2015
Travis Kavulla, Montana; November 2015 - November 2016
Robert F. Powelson, Pennsylvania; November 2016 - August 2017
John W. "Jack" Betkoski III, Connecticut; November 2017 - November 2018
Nick Wagner, Iowa; November 2018 - November 2019
Brandon Presley, Mississippi; November 2019 - November 2020
Paul Kjellander, Idaho; November 2020 - November 2021
Judith Williams Jagdmann, Virginia, November 2021 - November 2022
Michael A. Caron, Connecticut, November 2022 - November 2023