Names
- Illinois Central Railroad Company.1
- Illinois Tunnel Company.1
- International & Great Northern Railroad.1
- Interstate Commerce Commission.1
- Iowa Central Railway Company.1
- James, Edmund J. (Edmund Janes), 1855-1925.1
- Jameson, J. (John Franklin), 1859-1937.1
- Jameson, J. Franklin (John Franklin), 1859-1937.1
- Jeffery, Edward Turner, 1843-1927.1
- Jenks, Jeremiah Whipple, 1856-1929.1
- Johnson, Emory R. (Emory Richard), 1864-1950.1
- Johnson, Lyndon B. (Lyndon Baines), 1908-1973.1
- Jordan, David Starr, 1851-1931.1
- Jruks, J. W.1
- Kansas City Southern Railway.1
- Katona, George, 1901-1981.1
- Kennedy, John F. (John Fitzgerald), 1917-1963.1
- Keynes, John Maynard, 1883-1946.1
- Klein, Lawrence Robert.1
- Knight, George W. (George Wells), 1858-1932.1