D
- Davidson, Richard K. (born 1942), UP (president) 1991-1996 (CEO) 1997-2006.
- Davis, Champion McDonald, ACL.
- Davis, James, UTAH 2002-2008.
- Davis, Jerry, CSX 1989-1995, SP 1995-1996, UP 1996-1998.
- deButts, Harry A., SOU 1951-1962.
- deForest, Henry, SP 1925-1932.
- Delatour, H.L., LIRR 1949-1950.
- Denney, Charles E. (born 1879), Erie 1929-1939, NP 1939-1950.
- Depew, Chauncey M. (1834–1928), NYC 1885-1898.
- Deramus, William N., Jr. (1888–1965), KCS 1941-1961.
- Deramus, William N., III (1915–1989), CGW 1949-1957, MKT 1957-1961, KCS 1961-1973.
- Dermody, James J., LIRR 2003-2006.
- Dickinson, Jacob M. (1851–1928), RI 1915-1917.
- Dickson, Thomas, D&H 1869-1884.
- Dillon, Sidney (1812–1892), UP 1874–1884 and 1890–1892.
- Dix, John Adams (1798–1879), C&RI, M&M, UP 1863-1868, Erie 1872.
- Dixon, William J., RI 1970-1974.
- Dodge, Edwin V., SOO 1989-.
- Donnelly, Charles (1869–1939), NP 1920-1939.
- Dougherty, A. A., SMV 1911-.
- Downs, Lawrence A., IC 1926-1938.
- Downs, Thomas, Amtrak 1993-1998.
- Draney, Herbert J., NYSW -1968.
- Draper, William Henry, Jr. (1894–1974), LIRR 1950-1951.
- Drew, Daniel (1797–1879), Erie 1857-1870.
- Drusch, William F., TCW 2001-2007.
- Ducharme, Rick (born 1948), GO 1993-1999, TTC 1999-2006.
- Duff, John, UP 1873-1874.
- Dumaine, Frederick C., Jr., NH 1951-1954, D&H 1967-1968.
- Durant, Charles W., RI 1863-1866.
- Dürr, Heinz, DB 1991-1993, DB AG 1993-1997.
Read more about this topic: List Of Railroad Executives