A
- Abbot, Edwin H., WC 1890-.
- Adams, Charles Francis, Jr. (1835–1915), UP 1884-1890.
- Adams, Melvin O. (1847–1920), BRB&L.
- Aikman, Frank, Jr., LIRR 1967-1969.
- Allen, Horatio (1802–1889), Erie 1843-1844.
- Allen, John W. (1802–1887), CNR 1834, C&C 1845.
- Allyn, Henry G., Jr., P&LE 1969-1993.
- Alpert, George, NH.
- Altschul, Selig, D&H 1977.
- Ames, Oliver, Jr. (1807–1877), UP 1866-1871.
- Anderson, Samuel J., P&O.
- Anschutz, Philip (born 1939), RG 1984-1988, SP 1988-1996.
- Archbald, James, LSMS 1854-1856
- Arndt, Otto, DR 1970-1989.
- Ashby, G. F., UP 1946-1949.
- Ashley, James Mitchell (1824–1896), AA.
- Atkinson, Arthur K., WAB.
- Atterbury, William W. (1866–1935), PRR 1925-1935.
- Augustowski, Tadeusz, PKP -2005.
Read more about this topic: List Of Railroad Executives