1935 - 1941
Francis Johnson - Iowa Farm Bureau, Des Moines
1942 - 1947
Don V. McLean - Marshalltown County Taxpayers Association, Marshalltown
1948 - 1949
Guy E. Logan - Standard Chemical Co., Des Moines
1949 - 1953
John S. Heffner - farmer and banker, Webster City
1953 - 1954
George E. Pike - Pike, Sias & Butler, Waterloo
1955 - 1956
Joseph P. Lawlor - General Filter Co., Ames
1957 - 1959
Lyle R. Mercer - Aluminum Company of America , Davenport
1960 - 1964
Walter R. Cochran - John Deere Tractor Works, Waterloo
1965 - 1967
Murray B. Nelson - Maytag Corporation, Newton
1967 - 1968
Walter E. Brown - KIOWA Corporation, Marshalltown
1969 - 1971
Hugh H. Hannah - ALCOA, Davenport
1972 - 1973
John Munger - Deere & Company, Des Moines
1973 - 1975
Elmer E. Bloom - Grain Processing Corporation, Muscatine
1976 - 1977
Guy G. Gilchrist - Iowa Light & Power Company, Des Moines
1978 - 1980
John W. Brust - ALCOA, Davenport
1980 - 1981
Jack E. Knapp - Northwest States Portland Cement Company, Mason City
1981 - 1984
Gregory M. Brown - KIOWA Corporation, Marshalltown
1984 - 1986
Stan R. Hill - M.A. Ford Mfg. Co., Davenport
1986 - 1988
John F. Shanafelt - Iowa Public Service Co., Sioux City
1988 - 1989
Sander L. Schoonover - Winnebago Industries, Forest City
1989 - 1991
Richard D. Spencer - Lennox Industries, Marshalltown
1991 - 1993
Leonard B. Allen - Deere & Company, Waterloo
1993 - 1995
Warren H. Heidbreder - Bandag, Incorporated, Muscatine
1995 - 1997
Jerry L. Hadenfeldt - Meredith Corporation, Des Moines
1997 - 1999
Timothy M. Wilkinson - ALCOA, Bettendorf
1999 - 2001
Michael A. Eversmeyer - Varied Investments, Muscatine
2001 - 2003
Mickey J. Bladel - Bandag, Incorporated, Muscatine
2003 - 2005
Steven R. Evans - MidAmerican Energy, Des Moines
2005 - Present
Thomas K. Jarrett, Deere & Company, Moline