Names
- Rich, John Treadway, 1841-1926.1
- Richmond, William A., 1808-1870.1
- Richmond-Washington Company1
- Rio Grande Southern Railroad.1
- Sager, Abram, 1810-1877.1
- Saginaw Valley and St. Louis Railroad Company.1
- Saginaw, Tuscola and Huron Railroad Company.1
- Saint Charles Air Line Railroad1
- Saldern Logging Company.1
- Schwarz, J. E., 1799-1858.1
- Seaman & Webster.1
- Shay, Ephraim, 1839-1916.1
- Shearer, Jonathan, 1796-1881.1
- Shook, Jacob, 1779-1862.1
- Sibley, John Langdon, 1804-1885.1
- Sibley, Joseph.1
- Silver, Abiel, 1797-1881.1
- Smith, Henry, -1847.1
- Solvay Process Company.1
- Soo Line Railroad Company.1