Names
- Saginaw Valley and St. Louis Railroad Company.1
- Saginaw, Tuscola and Huron Railroad Company.1
- Saint Charles Air Line Railroad1
- Saldern Logging Company.1
- Salter, William Mackintire, 1853-1931.1
- San Pedro, Los Angeles & Salt Lake Railroad Company.1
- Sanborn, F. B. (Franklin Benjamin), 1831-1917.1
- Seaman & Webster.1
- Sedgwick, W. T. (William Thompson), 1855-1921.1
- Seligman, Edwin Robert Anderson, 1861-1939.1
- Sharfman, I. Leo (Isaiah Leo), 1886-1969.1
- Sharfman, Isaiah Leo, 1886-1
- Shaw, Albert, 1857-1947.1
- Shay, Ephraim, 1839-1916.1
- Shibley, George H. (George Henry), 1861-1
- Shibley, George H. (George Henry), b. 1861.1
- Small, Albion Woodbury, 1854-1926.1
- Small, Albion Woodbury, 1859-1926.1
- Smith, Henry Cassorte, 1859-1911.1
- Smith, J. Allen (James Allen), 1860-1926.1